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Php 从字符串中删除第一行和最后一行

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Php 从字符串中删除第一行和最后一行,php,string,file,lines,Php,String,File,Lines,我有一个名为$post的字符串（例如），它包含下面的数据。我想删除行，直到第一个“文本”（我不知道有多少标签，所以没有确切的行是可能的）。我还想删除最后一个“文本”下面的所有行 $test= <<<EOM <div id="content"> <div class="date">2013-02-11 16:19:57</div> <h2 clas

我有一个名为$post的字符串（例如），它包含下面的数据。我想删除行，直到第一个“文本”（我不知道有多少标签，所以没有确切的行是可能的）。我还想删除最后一个“文本”下面的所有行


$test= <<<EOM
<div id="content">
                    <div class="date">2013-02-11      16:19:57</div>
                    <h2 class="storytitle"><a href="p.php?slug=SOMESLUG">PRPHAHAHAH</a></h2>

                    <!-- TAGS -->
                    <div class="tags"><a href="/tag/">slug1</a> <a href="/tag/">slug2</a> <a href="/tag/">slug3</a> </div>TEXT<br />
TEXT<br />
TEXT<br />
TEXT<br />
TEXT<br />
<br />
<pre><code>1
2
3
4
5
</code></pre><br />
<br />
TEXT

                    <p id="comments" class="separator-story">
                        <!-- <div class="comments"></a href="/post/Somepost" -->
                    </p>
                    </div>
EOM;


$tok = strtok($test, "\n");

$found_start = false;
$found_middle = false;
$found_end = false;

$string_start = "";
$string_middle = "";
$string_end = "";

while ($tok !== false) {
    if ( strpos(str_replace(" ", "", $tok), "TEXT" ) === 0) {
      if(!$found_middle){
        //middle not found yet, so still looking for start
        $string_start = $string_start . $tok;
        $found_start = true;
      } else { 
        //middle found and this token starts with the key, so it is the end
        $string_end = $tok;
        $found_end = true;
      }
    } else if($found_start) {
        $string_middle = $string_middle . $tok;
        $found_middle = true;
    }
    if(!$found_end){
      $tok = strtok("\n");
    } else {
      $tok = false;
    }
}

echo $string_start . $string_middle . $string_end;


$test= <<<EOM
<div id="content">
                    <div class="date">2013-02-11      16:19:57</div>
                    <h2 class="storytitle"><a href="p.php?slug=SOMESLUG">PRPHAHAHAH</a></h2>

                    <!-- TAGS -->
                    <div class="tags"><a href="/tag/">slug1</a> <a href="/tag/">slug2</a> <a href="/tag/">slug3</a> </div>TEXT<br />
TEXT<br />
TEXT<br />
TEXT<br />
TEXT<br />
<br />
<pre><code>1
2
3
4
5
</code></pre><br />
<br />
TEXT

                    <p id="comments" class="separator-story">
                        <!-- <div class="comments"></a href="/post/Somepost" -->
                    </p>
                    </div>
EOM;


$tok = strtok($test, "\n");

$found_start = false;
$found_middle = false;
$found_end = false;

$string_start = "";
$string_middle = "";
$string_end = "";

while ($tok !== false) {
    if ( strpos(str_replace(" ", "", $tok), "TEXT" ) === 0) {
      if(!$found_middle){
        //middle not found yet, so still looking for start
        $string_start = $string_start . $tok;
        $found_start = true;
      } else { 
        //middle found and this token starts with the key, so it is the end
        $string_end = $tok;
        $found_end = true;
      }
    } else if($found_start) {
        $string_middle = $string_middle . $tok;
        $found_middle = true;
    }
    if(!$found_end){
      $tok = strtok("\n");
    } else {
      $tok = false;
    }
}

echo $string_start . $string_middle . $string_end;
正文

我只想在字符串中包含以下内容：

$input  = (your input string);
$search = 'TEXT';
$first  = strpos($input, $search);
$last   = strrpos($input, $search);

$final  = substr($input, $first, strlen($input) - $first - $last);


$test= <<<EOM
<div id="content">
                    <div class="date">2013-02-11      16:19:57</div>
                    <h2 class="storytitle"><a href="p.php?slug=SOMESLUG">PRPHAHAHAH</a></h2>

                    <!-- TAGS -->
                    <div class="tags"><a href="/tag/">slug1</a> <a href="/tag/">slug2</a> <a href="/tag/">slug3</a> </div>TEXT<br />
TEXT<br />
TEXT<br />
TEXT<br />
TEXT<br />
<br />
<pre><code>1
2
3
4
5
</code></pre><br />
<br />
TEXT

                    <p id="comments" class="separator-story">
                        <!-- <div class="comments"></a href="/post/Somepost" -->
                    </p>
                    </div>
EOM;


$tok = strtok($test, "\n");

$found_start = false;
$found_middle = false;
$found_end = false;

$string_start = "";
$string_middle = "";
$string_end = "";

while ($tok !== false) {
    if ( strpos(str_replace(" ", "", $tok), "TEXT" ) === 0) {
      if(!$found_middle){
        //middle not found yet, so still looking for start
        $string_start = $string_start . $tok;
        $found_start = true;
      } else { 
        //middle found and this token starts with the key, so it is the end
        $string_end = $tok;
        $found_end = true;
      }
    } else if($found_start) {
        $string_middle = $string_middle . $tok;
        $found_middle = true;
    }
    if(!$found_end){
      $tok = strtok("\n");
    } else {
      $tok = false;
    }
}

echo $string_start . $string_middle . $string_end;


$test= <<<EOM
<div id="content">
                    <div class="date">2013-02-11      16:19:57</div>
                    <h2 class="storytitle"><a href="p.php?slug=SOMESLUG">PRPHAHAHAH</a></h2>

                    <!-- TAGS -->
                    <div class="tags"><a href="/tag/">slug1</a> <a href="/tag/">slug2</a> <a href="/tag/">slug3</a> </div>TEXT<br />
TEXT<br />
TEXT<br />
TEXT<br />
TEXT<br />
<br />
<pre><code>1
2
3
4
5
</code></pre><br />
<br />
TEXT

                    <p id="comments" class="separator-story">
                        <!-- <div class="comments"></a href="/post/Somepost" -->
                    </p>
                    </div>
EOM;


$tok = strtok($test, "\n");

$found_start = false;
$found_middle = false;
$found_end = false;

$string_start = "";
$string_middle = "";
$string_end = "";

while ($tok !== false) {
    if ( strpos(str_replace(" ", "", $tok), "TEXT" ) === 0) {
      if(!$found_middle){
        //middle not found yet, so still looking for start
        $string_start = $string_start . $tok;
        $found_start = true;
      } else { 
        //middle found and this token starts with the key, so it is the end
        $string_end = $tok;
        $found_end = true;
      }
    } else if($found_start) {
        $string_middle = $string_middle . $tok;
        $found_middle = true;
    }
    if(!$found_end){
      $tok = strtok("\n");
    } else {
      $tok = false;
    }
}

echo $string_start . $string_middle . $string_end;
正文 注:

  • 我不知道用户会有多少标签，也不知道我有多少行 从一开始就移除，这意味着我不知道首先在哪里 “文本”开始
  • 我不知道帖子会有多大，也不知道从哪里发 我开始删除
  • 我只知道在那最后有5行 我需要把它们取下来。我只知道标签以和结尾 最后一行以开头
  • 我不知道我需要提取的文本的第一个字母/单词是什么（文本只是示例）
参考资料：

只需找到第一个事件和最后一个事件，并使用它们构建字符串：

参考，和。

给你


$test= <<<EOM
<div id="content">
                    <div class="date">2013-02-11      16:19:57</div>
                    <h2 class="storytitle"><a href="p.php?slug=SOMESLUG">PRPHAHAHAH</a></h2>

                    <!-- TAGS -->
                    <div class="tags"><a href="/tag/">slug1</a> <a href="/tag/">slug2</a> <a href="/tag/">slug3</a> </div>TEXT<br />
TEXT<br />
TEXT<br />
TEXT<br />
TEXT<br />
<br />
<pre><code>1
2
3
4
5
</code></pre><br />
<br />
TEXT

                    <p id="comments" class="separator-story">
                        <!-- <div class="comments"></a href="/post/Somepost" -->
                    </p>
                    </div>
EOM;


$tok = strtok($test, "\n");

$found_start = false;
$found_middle = false;
$found_end = false;

$string_start = "";
$string_middle = "";
$string_end = "";

while ($tok !== false) {
    if ( strpos(str_replace(" ", "", $tok), "TEXT" ) === 0) {
      if(!$found_middle){
        //middle not found yet, so still looking for start
        $string_start = $string_start . $tok;
        $found_start = true;
      } else { 
        //middle found and this token starts with the key, so it is the end
        $string_end = $tok;
        $found_end = true;
      }
    } else if($found_start) {
        $string_middle = $string_middle . $tok;
        $found_middle = true;
    }
    if(!$found_end){
      $tok = strtok("\n");
    } else {
      $tok = false;
    }
}

echo $string_start . $string_middle . $string_end;


$test= <<<EOM
<div id="content">
                    <div class="date">2013-02-11      16:19:57</div>
                    <h2 class="storytitle"><a href="p.php?slug=SOMESLUG">PRPHAHAHAH</a></h2>

                    <!-- TAGS -->
                    <div class="tags"><a href="/tag/">slug1</a> <a href="/tag/">slug2</a> <a href="/tag/">slug3</a> </div>TEXT<br />
TEXT<br />
TEXT<br />
TEXT<br />
TEXT<br />
<br />
<pre><code>1
2
3
4
5
</code></pre><br />
<br />
TEXT

                    <p id="comments" class="separator-story">
                        <!-- <div class="comments"></a href="/post/Somepost" -->
                    </p>
                    </div>
EOM;


$tok = strtok($test, "\n");

$found_start = false;
$found_middle = false;
$found_end = false;

$string_start = "";
$string_middle = "";
$string_end = "";

while ($tok !== false) {
    if ( strpos(str_replace(" ", "", $tok), "TEXT" ) === 0) {
      if(!$found_middle){
        //middle not found yet, so still looking for start
        $string_start = $string_start . $tok;
        $found_start = true;
      } else { 
        //middle found and this token starts with the key, so it is the end
        $string_end = $tok;
        $found_end = true;
      }
    } else if($found_start) {
        $string_middle = $string_middle . $tok;
        $found_middle = true;
    }
    if(!$found_end){
      $tok = strtok("\n");
    } else {
      $tok = false;
    }
}

echo $string_start . $string_middle . $string_end;
正文

EOM； $tok=strtok（$test，“\n”）； $found\u start=false； $found\u middle=false； $found\u end=false； $string_start=“”； $string_middle=“”； $string_end=“”； 而（$tok！==false）{ if（strpos（str_replace（“，”，$tok），“TEXT”）==0）{ 如果（！$found\u middle）{ //中间还没有找到，所以还在寻找开始 $string\u start=$string\u start.$tok； $found\u start=true； }否则{ //找到中间标记，该标记以键开始，因此它是结束标记 $string_end=$tok； $found\u end=true； } }else if（$found\u start）{ $string\u middle=$string\u middle.$tok； $found\u middle=true； } 如果（！$found\u end）{ $tok=strtok（“\n”）； }否则{ $tok=假； } } echo$string\u开始$绳子在中间$绳头；
啊，如果我不够清楚，很抱歉。我刚加了一颗子弹，看看。我不知道第一个字母/单词是什么。感谢您的参考和回答。如果您不知道我们要查找的
文本
单词，那么确定它的逻辑是什么？最后一个标记以“”结尾，哎哟，那代码太大了。正如你们在我问题的最后一个项目中看到的，我不知道文本是如何开始的。我不知道一开始是否会有“文本”段落。但这是给你的投票，谢谢你的贡献！