如何在php变量中获取跨度文本？

Question

<span class="cid"></span>

在上述范围内，我从 .js 文件中获取 id。例如，45，我想要 php 变量中的 id。例如，$cid='45';

我已经尝试过下面的代码，但我无法获得 id。

<?php echo $cid='<span class="cid"></span>'; ?>

<?php

    $str = $cid;

    $DOM = new DOMDocument;

    $DOM->loadHTML($str);

    $items = $DOM->getElementsByTagName('span');

    $span_list = array();

    for($i = 0; $i < $items->length; $i++) {

        $item = $items->item($i);

        $span_list[$item->getAttribute('class')] = $item->nodeValue;

    }

    extract($span_list);

    echo $cid; 

?>

Answer 1

试试这个在 php 代码中添加跨度文本以获取变量中的跨度值<?php$value = '<span class="cid"></span>';?>echo $value

Answer 2

请尝试以下代码并在最后检查您是否可以在数组中获取类值。第二次更新代码&nbsp; &nbsp; <?php&nbsp;&nbsp; &nbsp; echo $cid='<span class="cid">45</span>';&nbsp;?><?php&nbsp; &nbsp; $str = $cid;&nbsp; &nbsp; $DOM = new DOMDocument;&nbsp; &nbsp; $DOM->loadHTML($str);&nbsp; &nbsp; $items = $DOM->getElementsByTagName('span');&nbsp; &nbsp; $span_list = '';&nbsp; &nbsp; for($i = 0; $i < $items->length; $i++) {&nbsp; &nbsp; &nbsp; &nbsp; $item = $items->item($i);&nbsp; &nbsp; &nbsp; &nbsp; if($item->getAttribute('class') == 'cid'){&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; $span_list = $item->nodeValue;&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; }&nbsp; &nbsp; echo $span_list;?>&nbsp; &nbsp;多个跨度标签的代码并从该跨度列表数组中获取单个值。&nbsp; &nbsp; <?php&nbsp;&nbsp; &nbsp; $cid='<span class="cid">45</span> <span class="cid">48</span>';&nbsp;?><?php&nbsp; &nbsp; $str = $cid;&nbsp; &nbsp; $DOM = new DOMDocument;&nbsp; &nbsp; $DOM->loadHTML($str);&nbsp; &nbsp; $items = $DOM->getElementsByTagName('span');&nbsp; &nbsp; $span_list = array();&nbsp; &nbsp; for($i = 0; $i < $items->length; $i++) {&nbsp; &nbsp; &nbsp; &nbsp; $item = $items->item($i);&nbsp; &nbsp; &nbsp; &nbsp; if($item->getAttribute('class') == 'cid'){&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; $span_list[] = $item->nodeValue;&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; }&nbsp; &nbsp; //get the each value for multiple span tag&nbsp; &nbsp; foreach ($span_list as $key => $value) {&nbsp; &nbsp; &nbsp; &nbsp; echo $value;&nbsp; &nbsp; &nbsp; &nbsp; echo '<br/>';&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp; }?>

Answer 3

添加AJAX代码以将其传递给 PHP$.ajax({&nbsp; &nbsp; url: 'your_php_file.php',&nbsp; &nbsp; method: 'POST',&nbsp; &nbsp; data: {cid: $('.cid')[0].innerText},&nbsp; &nbsp; success: function(result){&nbsp; &nbsp; &nbsp; &nbsp; console.log(result);&nbsp; &nbsp; }})并在您的PHP文件中。你可以使用strip_tags&nbsp;echo strip_tags($_POST['cid']);