Javascript 从PHP foreach循环中剥离最后一个逗号_Javascript_Php

Javascript 从PHP foreach循环中剥离最后一个逗号

javascript php

Javascript 从PHP foreach循环中剥离最后一个逗号,javascript,php,Javascript,Php,我想知道如何在javascript内部运行的PHP脚本中删除这个foreach循环中的尾随逗号 <html> <head&

我想知道如何在javascript内部运行的PHP脚本中删除这个foreach循环中的尾随逗号

<html>                                                                                                                                                                              
      <head>                                                                                                                                                                            
    <script type='text/javascript' src='https://www.google.com/jsapi'></script>                                                                                                     
    <script type='text/javascript'>                                                                                                                                                 
     google.load('visualization', '1', {'packages': ['geochart']});                                                                                                                 
     google.setOnLoadCallback(drawRegionsMap);                                                                                                                                      

  function drawRegionsMap() {
    var data = google.visualization.arrayToDataTable([
    ['Country','Blocks'],
  <?php
    foreach ($bans as $key => $value)
                print"['$key', $value],\n";
    ?>
    ]);

    var options = {
                    backgroundColor : '#555555',
                    colors : ['#FFFF00', '#FF0000']
                    };

    var chart = new google.visualization.GeoChart(document.getElementById('chart_div'));
    chart.draw(data, options);
};
</script>
  </head>
  <body>
<div id="chart_div" style="width: 900px; height: 500px;"></div>
  </body>
</html>

  function drawRegionsMap() {
    var data = google.visualization.arrayToDataTable([
    ['Country','Blocks'],
  ['Japan', 11],
['United States', 45],
['Argentina', 1],
         ]);

    var options = {
                    backgroundColor : '#555555',
                    colors : ['#FFFF00', '#FF0000']
                    };

    var chart = new google.visualization.GeoChart(document.getElementById('chart_div'));
    chart.draw(data, options);
    };
    </script>
  </head>
  <body>
    <div id="chart_div" style="width: 900px; height: 500px;"></div>
  </body>
</html>


load（'visualization'，'1'，{'packages'：['geochart']}）；
setOnLoadCallback（DrawRegionMap）；
函数drawRegionsMap（）{
var data=google.visualization.arrayToDataTable([
[“国家”，“街区]，
你错过了什么：
  function drawRegionsMap() {
    var data = google.visualization.arrayToDataTable([
    ['Country','Blocks'],
  ['Japan', 11],
['United States', 45],
['Argentina', 1],
         ]);

    var options = {
                    backgroundColor : '#555555',
                    colors : ['#FFFF00', '#FF0000']
                    };

    var chart = new google.visualization.GeoChart(document.getElementById('chart_div'));
    chart.draw(data, options);
    };
    </script>
  </head>
  <body>
    <div id="chart_div" style="width: 900px; height: 500px;"></div>
  </body>
</html>

echo rtrim($resultstr, ",");

你也可以这样做：
  function drawRegionsMap() {
    var data = google.visualization.arrayToDataTable([
    ['Country','Blocks'],
  ['Japan', 11],
['United States', 45],
['Argentina', 1],
         ]);

    var options = {
                    backgroundColor : '#555555',
                    colors : ['#FFFF00', '#FF0000']
                    };

    var chart = new google.visualization.GeoChart(document.getElementById('chart_div'));
    chart.draw(data, options);
    };
    </script>
  </head>
  <body>
    <div id="chart_div" style="width: 900px; height: 500px;"></div>
  </body>
</html>

echo substr($resultstr, 0, -1);

您应该做的不是事后修剪字符串，而是根本不生成尾随逗号：
  function drawRegionsMap() {
    var data = google.visualization.arrayToDataTable([
    ['Country','Blocks'],
  ['Japan', 11],
['United States', 45],
['Argentina', 1],
         ]);

    var options = {
                    backgroundColor : '#555555',
                    colors : ['#FFFF00', '#FF0000']
                    };

    var chart = new google.visualization.GeoChart(document.getElementById('chart_div'));
    chart.draw(data, options);
    };
    </script>
  </head>
  <body>
    <div id="chart_div" style="width: 900px; height: 500px;"></div>
  </body>
</html>

$not_first = false;
foreach ($bans as $key => $value) {
    if ($not_first) {
        print(", ");
    }
    $not_first = true;
    print "['$key', $value]\n";
}

这可能是另一种方法：
  function drawRegionsMap() {
    var data = google.visualization.arrayToDataTable([
    ['Country','Blocks'],
  ['Japan', 11],
['United States', 45],
['Argentina', 1],
         ]);

    var options = {
                    backgroundColor : '#555555',
                    colors : ['#FFFF00', '#FF0000']
                    };

    var chart = new google.visualization.GeoChart(document.getElementById('chart_div'));
    chart.draw(data, options);
    };
    </script>
  </head>
  <body>
    <div id="chart_div" style="width: 900px; height: 500px;"></div>
  </body>
</html>

var data = google.visualization.arrayToDataTable(<?php
$table = array(array('Country', 'Blocks'));
foreach($bans as $key => $value) {
    $table[] = array($key, $value);
}
echo json_encode($table);
?>);

var data=google.visualization.arrayToDataTable（）；

我经常使用json_encode，因此不必转义所有值。
您可以创建一个包含[键，值]
片段的数组，然后用内爆
粘合它们：
  function drawRegionsMap() {
    var data = google.visualization.arrayToDataTable([
    ['Country','Blocks'],
  ['Japan', 11],
['United States', 45],
['Argentina', 1],
         ]);

    var options = {
                    backgroundColor : '#555555',
                    colors : ['#FFFF00', '#FF0000']
                    };

    var chart = new google.visualization.GeoChart(document.getElementById('chart_div'));
    chart.draw(data, options);
    };
    </script>
  </head>
  <body>
    <div id="chart_div" style="width: 900px; height: 500px;"></div>
  </body>
</html>

PHP
  function drawRegionsMap() {
    var data = google.visualization.arrayToDataTable([
    ['Country','Blocks'],
  ['Japan', 11],
['United States', 45],
['Argentina', 1],
         ]);

    var options = {
                    backgroundColor : '#555555',
                    colors : ['#FFFF00', '#FF0000']
                    };

    var chart = new google.visualization.GeoChart(document.getElementById('chart_div'));
    chart.draw(data, options);
    };
    </script>
  </head>
  <body>
    <div id="chart_div" style="width: 900px; height: 500px;"></div>
  </body>
</html>

<?php
$arr = array();
$arr['key1'] = 'val1';
$arr['key2'] = 'val2';
$arr['key3'] = 'val3';

function PrepareValues(&$item, $key) {
    $item = "['$key', $item]";
}
array_walk_recursive($arr, "PrepareValues");
$resultstr = implode(",\n", $arr);
print($resultstr);
?>

我只是在PHP脚本的末尾尝试了这两种方法，在查看站点的HTML源代码时，脚本结果仍然相同，将编译后的源代码添加到原始问题中。@user1848130也尝试一下我的解决方案，可能会有所帮助。同意。更聪明的是，首先不要使用逗号，也要按照@vst的建议使用json_encodem是个好主意。我想内爆对于这种方法来说要容易得多，这是非常有意义的，非常感谢（还有3分钟，我才能接受你的回答。）