PHP脚本输出的AJAX连续响应

我的PHP脚本的AJAX响应有问题

我已经创建了“Status”div，在这里我想输出PHP脚本的响应。它工作得很好，但只有在整个脚本完成时才会显示响应，我希望输出每个echo“live”

这是我的档案：

form.php

<!-- left column -->
<div class="col-md-6">
    <!-- general form elements -->
    <div class="card card-primary">
        <div class="card-header">
            <h3 class="card-title"><?php echo $xmlData->name ?></h3>
        </div>
        <!-- /.card-header -->
        <!-- form start -->
        <form id="upload_form" enctype="multipart/form-data" method="post">
            <div class="card-body">
                <div class="form-group">
                    <label for="debFile">Deb file</label>
                    <span id="debMSG"></span>
                    <div class="input-group">
                        <div class="custom-file">
                            <input name="debFile" type="file" class="custom-file-input" id="debFile">
                            <label class="custom-file-label" for="debFile">Choose .deb file</label>
                        </div>
                    </div>
                </div>
                <div class="form-group">
                    <label for="version">Version</label>
                    <input type="text" name="version" id="version" class="form-control" value="<?php echo ver_up($xmlData->changelogs->change->version); ?>">
                </div>
                <div class="form-group">
                    <label for="log">Log</label>
                    <input type="text" name="log" id="log" class="form-control" value="Bug fix">
                </div>
                <div class="form-check">
                    <input name="tweet" type="checkbox" class="form-check-input" id="tweet" value="1">
                    <label class="form-check-label" for="tweet">Auto-post on Twitter</label>
                </div>
            </div>
            <!-- /.card-body -->

            <div class="card-footer">
                <button id="submit" name="upload" type="submit" class="btn btn-primary">Update</button>
            </div>
        </form>
    </div>
    <!-- /.card -->
</div>
<!-- Status -->
<div id="status" class="col-md-6" style="display:none;">
    <div class="card card-default">
        <div class="card-header">
            <h3 class="card-title">Status:</h3>
        </div>
        <div class="alert alert-default">
            <ul id="output" class="list-group"></ul>
        </div>
    </div>
</div>
<!--/.col (right) -->

<script type="text/javascript">
$(document).ready(function () {
    bsCustomFileInput.init();

    const Toast = Swal.mixin({
        toast: true,
        position: 'top-end',
        showConfirmButton: false,
        timer: 5000
    });

    $(document).on('submit', '#upload_form', function(event){
        event.preventDefault();

        if($('#debFile').val() == '')
        {
            $('#debMSG').html('<div class="alert alert-danger">Enter .deb file!</div>');
            $('#debMSG').show();
            setTimeout(function() {
                $('#debMSG').fadeOut('fast');
            }, 5000);
            return false;
        }
        else
        {

            $.ajax({
                type: 'POST',
                url: 'scripts/test.php',
                data: new FormData(this),
                // async: true,
                cache: false,
                processData: false,
                contentType: false,
                beforeSend:function()
                {
                    $('#debMSG').hide();
                    $('#submit').attr('disabled', 'disabled');
                    // $('#status').fadeIn('slow');
                }
            })
            .done(function(data) {
                // console.log(data);
                $('#output').append(data);
                $('#status').fadeIn('slow');
                // if(!data.success){
                //  $('#submit').removeClass('btn-primary').addClass('btn-danger');
                //  $('#submit').attr('disabled', false);
                //  $('#submit').removeAttr('name type');
                //  $('#submit').attr('onClick', 'location.reload();');
                //  $('#submit').html('Reload');
                //  Toast.fire({
                //      icon: 'error',
                //      title: 'There was an error while updating tweak!'
                //  })
                // } else {
                    $('#submit').removeClass('btn-primary').addClass('btn-success');
                    $('#submit').attr('disabled', false);
                    $('#submit').removeAttr('name type');
                    $('#submit').attr('onClick', 'window.location.href = "manage-packages.php";');
                    $('#submit').html('Finish');
                    Toast.fire({
                        icon: 'success',
                        title: 'Tweak has been successfully updated!'
                    })
                // }
            })
            .fail(function(data) {
                console.log(data);
                $('#output').append("There was an error while updating tweak!");
                // $('#output').removeClass('alert-success').addClass('alert-danger');
                $('#status').fadeIn('slow');
                $('#submit').removeClass('btn-primary').addClass('btn-danger');
                $('#submit').attr('disabled', false);
                $('#submit').removeAttr('name type');
                $('#submit').attr('onClick', 'location.reload();');
                $('#submit').html('Reload');
                Toast.fire({
                    icon: 'error',
                    title: 'There was an error while updating tweak!'
                })
            });
        }
    });
});
</script>

<?php

header('Content-type: text/html; charset=utf-8');

require_once("../../src/config-ssh.php");
require_once("../../src/functions.php");

$deb_dir = "/var/www/html/debs/";
$repo_dir = "/var/www/html/";

function output($val) {
    echo nl2br ($val);
    flush();
    ob_flush();
    sleep(1);
}

try {
    if (isset($_FILES["debFile"]["name"])) {
        $debFile = $_FILES["debFile"]["tmp_name"];
        $deb_file = $deb_dir . basename($_FILES["debFile"]["name"]);

        if (!file_exists($deb_file)) {
            output("<li class=\"list-group-item list-group-item-success\">DEB file \"". basename( $_FILES["debFile"]["name"]). "\" has been uploaded.</li>");
        } else {
            throw new Exception("<li class=\"list-group-item list-group-item-danger\">DEB file \"". basename( $_FILES["debFile"]["name"]). "\" already exists!</li>");
        }
    } else {
        throw new Exception("<li class=\"list-group-item list-group-item-danger\">You didn't choose any DEB file!</li>");
    }

    preg_match('/(.*)_(.*)_(.*)\.deb/', basename($_FILES["debFile"]["name"]), $deb_reg);
    $dirname = $deb_reg[1];
    $prev_ver = ver_down($deb_reg[2]);
    $exten = $deb_reg[3] . ".deb";
    $prev_deb_name = $dirname."_".$prev_ver."_".$exten;
    $prev_deb = $deb_dir . $prev_deb_name;

    if (isset($_POST['version']) && isset($_POST['log'])) {
        output("<li class=\"list-group-item list-group-item-success\">Values were added to XML!</li>");
    }

    if (file_exists($prev_deb)) {
        output("<li class=\"list-group-item list-group-item-success\">Previous version of DEB file (\"". $prev_deb_name . "\") was deleted!</li>");
    } else {
        throw new Exception("<li class=\"list-group-item list-group-item-danger\">DEB file \"". $prev_deb_name . "\" wasn't deleted!</li>");
    }


    // Run a command
    output("<li class=\"list-group-item list-group-item-info\">Running Repo update script...</li>");
        output("<li class=\"list-group-item list-group-item-success\">Script finished successfully.</li>");

    // Auto-post Tweet
    if (isset($_POST['tweet'])) {
        output("$msg");
        output("<li class=\"list-group-item list-group-item-success\">Tweet has been successfully posted.</li>");
    }

    exit();
}

catch( Exception $e ) {
    $message = $e->getMessage();

    die( "ERROR: " . $message );
}

?>

姓名？>
Deb文件
选择.deb文件
版本
日志
在Twitter上自动发布
更新
地位：

form.php中的ajax

<!-- left column -->
<div class="col-md-6">
    <!-- general form elements -->
    <div class="card card-primary">
        <div class="card-header">
            <h3 class="card-title"><?php echo $xmlData->name ?></h3>
        </div>
        <!-- /.card-header -->
        <!-- form start -->
        <form id="upload_form" enctype="multipart/form-data" method="post">
            <div class="card-body">
                <div class="form-group">
                    <label for="debFile">Deb file</label>
                    <span id="debMSG"></span>
                    <div class="input-group">
                        <div class="custom-file">
                            <input name="debFile" type="file" class="custom-file-input" id="debFile">
                            <label class="custom-file-label" for="debFile">Choose .deb file</label>
                        </div>
                    </div>
                </div>
                <div class="form-group">
                    <label for="version">Version</label>
                    <input type="text" name="version" id="version" class="form-control" value="<?php echo ver_up($xmlData->changelogs->change->version); ?>">
                </div>
                <div class="form-group">
                    <label for="log">Log</label>
                    <input type="text" name="log" id="log" class="form-control" value="Bug fix">
                </div>
                <div class="form-check">
                    <input name="tweet" type="checkbox" class="form-check-input" id="tweet" value="1">
                    <label class="form-check-label" for="tweet">Auto-post on Twitter</label>
                </div>
            </div>
            <!-- /.card-body -->

            <div class="card-footer">
                <button id="submit" name="upload" type="submit" class="btn btn-primary">Update</button>
            </div>
        </form>
    </div>
    <!-- /.card -->
</div>
<!-- Status -->
<div id="status" class="col-md-6" style="display:none;">
    <div class="card card-default">
        <div class="card-header">
            <h3 class="card-title">Status:</h3>
        </div>
        <div class="alert alert-default">
            <ul id="output" class="list-group"></ul>
        </div>
    </div>
</div>
<!--/.col (right) -->

<script type="text/javascript">
$(document).ready(function () {
    bsCustomFileInput.init();

    const Toast = Swal.mixin({
        toast: true,
        position: 'top-end',
        showConfirmButton: false,
        timer: 5000
    });

    $(document).on('submit', '#upload_form', function(event){
        event.preventDefault();

        if($('#debFile').val() == '')
        {
            $('#debMSG').html('<div class="alert alert-danger">Enter .deb file!</div>');
            $('#debMSG').show();
            setTimeout(function() {
                $('#debMSG').fadeOut('fast');
            }, 5000);
            return false;
        }
        else
        {

            $.ajax({
                type: 'POST',
                url: 'scripts/test.php',
                data: new FormData(this),
                // async: true,
                cache: false,
                processData: false,
                contentType: false,
                beforeSend:function()
                {
                    $('#debMSG').hide();
                    $('#submit').attr('disabled', 'disabled');
                    // $('#status').fadeIn('slow');
                }
            })
            .done(function(data) {
                // console.log(data);
                $('#output').append(data);
                $('#status').fadeIn('slow');
                // if(!data.success){
                //  $('#submit').removeClass('btn-primary').addClass('btn-danger');
                //  $('#submit').attr('disabled', false);
                //  $('#submit').removeAttr('name type');
                //  $('#submit').attr('onClick', 'location.reload();');
                //  $('#submit').html('Reload');
                //  Toast.fire({
                //      icon: 'error',
                //      title: 'There was an error while updating tweak!'
                //  })
                // } else {
                    $('#submit').removeClass('btn-primary').addClass('btn-success');
                    $('#submit').attr('disabled', false);
                    $('#submit').removeAttr('name type');
                    $('#submit').attr('onClick', 'window.location.href = "manage-packages.php";');
                    $('#submit').html('Finish');
                    Toast.fire({
                        icon: 'success',
                        title: 'Tweak has been successfully updated!'
                    })
                // }
            })
            .fail(function(data) {
                console.log(data);
                $('#output').append("There was an error while updating tweak!");
                // $('#output').removeClass('alert-success').addClass('alert-danger');
                $('#status').fadeIn('slow');
                $('#submit').removeClass('btn-primary').addClass('btn-danger');
                $('#submit').attr('disabled', false);
                $('#submit').removeAttr('name type');
                $('#submit').attr('onClick', 'location.reload();');
                $('#submit').html('Reload');
                Toast.fire({
                    icon: 'error',
                    title: 'There was an error while updating tweak!'
                })
            });
        }
    });
});
</script>

<?php

header('Content-type: text/html; charset=utf-8');

require_once("../../src/config-ssh.php");
require_once("../../src/functions.php");

$deb_dir = "/var/www/html/debs/";
$repo_dir = "/var/www/html/";

function output($val) {
    echo nl2br ($val);
    flush();
    ob_flush();
    sleep(1);
}

try {
    if (isset($_FILES["debFile"]["name"])) {
        $debFile = $_FILES["debFile"]["tmp_name"];
        $deb_file = $deb_dir . basename($_FILES["debFile"]["name"]);

        if (!file_exists($deb_file)) {
            output("<li class=\"list-group-item list-group-item-success\">DEB file \"". basename( $_FILES["debFile"]["name"]). "\" has been uploaded.</li>");
        } else {
            throw new Exception("<li class=\"list-group-item list-group-item-danger\">DEB file \"". basename( $_FILES["debFile"]["name"]). "\" already exists!</li>");
        }
    } else {
        throw new Exception("<li class=\"list-group-item list-group-item-danger\">You didn't choose any DEB file!</li>");
    }

    preg_match('/(.*)_(.*)_(.*)\.deb/', basename($_FILES["debFile"]["name"]), $deb_reg);
    $dirname = $deb_reg[1];
    $prev_ver = ver_down($deb_reg[2]);
    $exten = $deb_reg[3] . ".deb";
    $prev_deb_name = $dirname."_".$prev_ver."_".$exten;
    $prev_deb = $deb_dir . $prev_deb_name;

    if (isset($_POST['version']) && isset($_POST['log'])) {
        output("<li class=\"list-group-item list-group-item-success\">Values were added to XML!</li>");
    }

    if (file_exists($prev_deb)) {
        output("<li class=\"list-group-item list-group-item-success\">Previous version of DEB file (\"". $prev_deb_name . "\") was deleted!</li>");
    } else {
        throw new Exception("<li class=\"list-group-item list-group-item-danger\">DEB file \"". $prev_deb_name . "\" wasn't deleted!</li>");
    }


    // Run a command
    output("<li class=\"list-group-item list-group-item-info\">Running Repo update script...</li>");
        output("<li class=\"list-group-item list-group-item-success\">Script finished successfully.</li>");

    // Auto-post Tweet
    if (isset($_POST['tweet'])) {
        output("$msg");
        output("<li class=\"list-group-item list-group-item-success\">Tweet has been successfully posted.</li>");
    }

    exit();
}

catch( Exception $e ) {
    $message = $e->getMessage();

    die( "ERROR: " . $message );
}

?>

$（文档）.ready（函数（）{
bsCustomFileInput.init（）；
const Toast=Swal.mixin({
吐司：是的，
位置：'顶端'，
showconfixton:false，
计时器：5000
});
$（文档）。在（'submit'，'upload_form'，函数（事件）{
event.preventDefault（）；
if（$（'#debFile'）.val（）=''）
{
$（'#debMSG'）.html（'Enter.deb file！'）；
$（'#debMSG'）.show（）；
setTimeout（函数（）{
$（'#debMSG'）.fadeOut（'fast'）；
}, 5000);
返回false；
}
其他的
{
$.ajax({
键入：“POST”，
url:'scripts/test.php'，
数据：新表单数据（本），
//async:true，
cache:false，
processData:false，
contentType:false，
beforeSend:function（）
{
$（'#debMSG'）.hide（）；
$（'提交'）.attr（'禁用'，'禁用'）；
//$（'#status'）.fadeIn（'slow'）；
}
})
.完成（功能（数据）{
//控制台日志（数据）；
$（“#输出”）。追加（数据）；
$（'#status'）.fadeIn（'slow'）；
//如果（！data.success）{
//$（“#提交”）.removeClass（'btn-primary'）.addClass（'btn-danger'）；
//$（“#提交”）.attr（'disabled'，false）；
//$（“#提交”）.removeAttr（'name type'）；
//$（'#submit'）.attr（'onClick'，'location.reload（）；'）；
//$（'#submit'）.html（'Reload'）；
//烤面包，火({
//图标：“错误”，
//标题：“更新调整时出错！”
//  })
//}其他{
$（“#提交”）.removeClass（'btn-primary'）.addClass（'btn-success'）；
$（“#提交”）.attr（'disabled'，false）；
$（“#提交”）.removeAttr（'name type'）；
$（'#submit'）.attr（'onClick'，'window.location.href=“manage packages.php”）；
$（'#submit'）.html（'Finish'）；
烤面包，火({
图标：“成功”，
标题：“调整已成功更新！”
})
// }
})
.失败（功能（数据）{
控制台日志（数据）；
$（“#输出”）.append（“更新调整时出错！”）；
//$（“#输出”）.removeClass（'alert-success'）.addClass（'alert-danger'）；
$（'#status'）.fadeIn（'slow'）；
$（“#提交”）.removeClass（'btn-primary'）.addClass（'btn-danger'）；
$（“#提交”）.attr（'disabled'，false）；
$（“#提交”）.removeAttr（'name type'）；
$（'#submit'）.attr（'onClick'，'location.reload（）；'）；
$（'#submit'）.html（'Reload'）；
烤面包，火({
图标：“错误”，
标题：“更新调整时出错！”
})
});
}
});
});

test.php

<!-- left column -->
<div class="col-md-6">
    <!-- general form elements -->
    <div class="card card-primary">
        <div class="card-header">
            <h3 class="card-title"><?php echo $xmlData->name ?></h3>
        </div>
        <!-- /.card-header -->
        <!-- form start -->
        <form id="upload_form" enctype="multipart/form-data" method="post">
            <div class="card-body">
                <div class="form-group">
                    <label for="debFile">Deb file</label>
                    <span id="debMSG"></span>
                    <div class="input-group">
                        <div class="custom-file">
                            <input name="debFile" type="file" class="custom-file-input" id="debFile">
                            <label class="custom-file-label" for="debFile">Choose .deb file</label>
                        </div>
                    </div>
                </div>
                <div class="form-group">
                    <label for="version">Version</label>
                    <input type="text" name="version" id="version" class="form-control" value="<?php echo ver_up($xmlData->changelogs->change->version); ?>">
                </div>
                <div class="form-group">
                    <label for="log">Log</label>
                    <input type="text" name="log" id="log" class="form-control" value="Bug fix">
                </div>
                <div class="form-check">
                    <input name="tweet" type="checkbox" class="form-check-input" id="tweet" value="1">
                    <label class="form-check-label" for="tweet">Auto-post on Twitter</label>
                </div>
            </div>
            <!-- /.card-body -->

            <div class="card-footer">
                <button id="submit" name="upload" type="submit" class="btn btn-primary">Update</button>
            </div>
        </form>
    </div>
    <!-- /.card -->
</div>
<!-- Status -->
<div id="status" class="col-md-6" style="display:none;">
    <div class="card card-default">
        <div class="card-header">
            <h3 class="card-title">Status:</h3>
        </div>
        <div class="alert alert-default">
            <ul id="output" class="list-group"></ul>
        </div>
    </div>
</div>
<!--/.col (right) -->

<script type="text/javascript">
$(document).ready(function () {
    bsCustomFileInput.init();

    const Toast = Swal.mixin({
        toast: true,
        position: 'top-end',
        showConfirmButton: false,
        timer: 5000
    });

    $(document).on('submit', '#upload_form', function(event){
        event.preventDefault();

        if($('#debFile').val() == '')
        {
            $('#debMSG').html('<div class="alert alert-danger">Enter .deb file!</div>');
            $('#debMSG').show();
            setTimeout(function() {
                $('#debMSG').fadeOut('fast');
            }, 5000);
            return false;
        }
        else
        {

            $.ajax({
                type: 'POST',
                url: 'scripts/test.php',
                data: new FormData(this),
                // async: true,
                cache: false,
                processData: false,
                contentType: false,
                beforeSend:function()
                {
                    $('#debMSG').hide();
                    $('#submit').attr('disabled', 'disabled');
                    // $('#status').fadeIn('slow');
                }
            })
            .done(function(data) {
                // console.log(data);
                $('#output').append(data);
                $('#status').fadeIn('slow');
                // if(!data.success){
                //  $('#submit').removeClass('btn-primary').addClass('btn-danger');
                //  $('#submit').attr('disabled', false);
                //  $('#submit').removeAttr('name type');
                //  $('#submit').attr('onClick', 'location.reload();');
                //  $('#submit').html('Reload');
                //  Toast.fire({
                //      icon: 'error',
                //      title: 'There was an error while updating tweak!'
                //  })
                // } else {
                    $('#submit').removeClass('btn-primary').addClass('btn-success');
                    $('#submit').attr('disabled', false);
                    $('#submit').removeAttr('name type');
                    $('#submit').attr('onClick', 'window.location.href = "manage-packages.php";');
                    $('#submit').html('Finish');
                    Toast.fire({
                        icon: 'success',
                        title: 'Tweak has been successfully updated!'
                    })
                // }
            })
            .fail(function(data) {
                console.log(data);
                $('#output').append("There was an error while updating tweak!");
                // $('#output').removeClass('alert-success').addClass('alert-danger');
                $('#status').fadeIn('slow');
                $('#submit').removeClass('btn-primary').addClass('btn-danger');
                $('#submit').attr('disabled', false);
                $('#submit').removeAttr('name type');
                $('#submit').attr('onClick', 'location.reload();');
                $('#submit').html('Reload');
                Toast.fire({
                    icon: 'error',
                    title: 'There was an error while updating tweak!'
                })
            });
        }
    });
});
</script>

<?php

header('Content-type: text/html; charset=utf-8');

require_once("../../src/config-ssh.php");
require_once("../../src/functions.php");

$deb_dir = "/var/www/html/debs/";
$repo_dir = "/var/www/html/";

function output($val) {
    echo nl2br ($val);
    flush();
    ob_flush();
    sleep(1);
}

try {
    if (isset($_FILES["debFile"]["name"])) {
        $debFile = $_FILES["debFile"]["tmp_name"];
        $deb_file = $deb_dir . basename($_FILES["debFile"]["name"]);

        if (!file_exists($deb_file)) {
            output("<li class=\"list-group-item list-group-item-success\">DEB file \"". basename( $_FILES["debFile"]["name"]). "\" has been uploaded.</li>");
        } else {
            throw new Exception("<li class=\"list-group-item list-group-item-danger\">DEB file \"". basename( $_FILES["debFile"]["name"]). "\" already exists!</li>");
        }
    } else {
        throw new Exception("<li class=\"list-group-item list-group-item-danger\">You didn't choose any DEB file!</li>");
    }

    preg_match('/(.*)_(.*)_(.*)\.deb/', basename($_FILES["debFile"]["name"]), $deb_reg);
    $dirname = $deb_reg[1];
    $prev_ver = ver_down($deb_reg[2]);
    $exten = $deb_reg[3] . ".deb";
    $prev_deb_name = $dirname."_".$prev_ver."_".$exten;
    $prev_deb = $deb_dir . $prev_deb_name;

    if (isset($_POST['version']) && isset($_POST['log'])) {
        output("<li class=\"list-group-item list-group-item-success\">Values were added to XML!</li>");
    }

    if (file_exists($prev_deb)) {
        output("<li class=\"list-group-item list-group-item-success\">Previous version of DEB file (\"". $prev_deb_name . "\") was deleted!</li>");
    } else {
        throw new Exception("<li class=\"list-group-item list-group-item-danger\">DEB file \"". $prev_deb_name . "\" wasn't deleted!</li>");
    }


    // Run a command
    output("<li class=\"list-group-item list-group-item-info\">Running Repo update script...</li>");
        output("<li class=\"list-group-item list-group-item-success\">Script finished successfully.</li>");

    // Auto-post Tweet
    if (isset($_POST['tweet'])) {
        output("$msg");
        output("<li class=\"list-group-item list-group-item-success\">Tweet has been successfully posted.</li>");
    }

    exit();
}

catch( Exception $e ) {
    $message = $e->getMessage();

    die( "ERROR: " . $message );
}

?>

getMessage（）；
die（“错误：.$message”）；
}
?>

最后，它打印此状态输出：

我已经尝试了好几个教程，但是没有一个适合这个

---

谢谢你的建议

您需要将处理程序绑定到XmlHttpRequest对象的

progress

事件。jQuery不提供本机接口来实现这一点，但如果您仍然希望使用jQuery进行AJAX调用，而不是直接使用XmlHttpRequest对象，则可以通过回调函数更改底层XmlHttpRequest对象，并通过以下方式添加处理程序：

$.ajax({
    ...
    xhr: function() {
        // get the native XmlHttpRequest object
        const xhr = $.ajaxSettings.xhr();
        // set the onprogress event handler
        xhr.onprogress = function() {
            // replace the '#output' element inner HTML with the received part of the response
            $('#output').html(xhr.responseText);
        }
        return xhr;
    }
})
.done(function(data) {
    ...
})
.fail(function(data) {
    ...
});

很难从XMLHttpRequest标准的定义中看出这一点，但是声明该事件大约每50毫秒或每接收一个字节触发一次，以频率最低的为准

您应该对javascript代码进行的其他更改包括

• 取消注释

  $（'#status'）.fadeIn（'slow'）beforeSend

  函数中的code>行，并将其从其他函数中删除
• 删除

  $（'#output'）。追加（数据）行从
  done
  事件处理程序函数中，所有接收到的数据应该已经通过
  onprogress
  处理程序函数注入

最后但并非最不重要的部分是关于缓冲。我假设您将nginx与PHP-FPM一起使用，因为您在问题中添加了

nginx

标记。您已经使用了

flush（）

和

ob\u flush（）

PHP函数，没错，为了刷新PHP缓冲区，您需要这两个函数。然而，还有一个缓冲区