php - PHP Preg_Replace，“开头”不起作用

Question

有人可以解释一下，为什么我的代码没有给我任何回报？

<?php
    $text = '<article about="about_text" typeof="sioc:Item foaf:Document" class="node node-bildergalerie node-published node-not-promoted node-not-sticky author-lalala odd clearfix" id="node-bildergalerie-6835">';
    $search_for = '(author\-.*?)\s';
    $replace = '';
    print preg_replace($search_for, $replace, $text);
?>

Answer 1

您缺少分隔符：

$search_for = '~(author\-\w+)\s~';

还将non-greedy 更改.*?为\w+where \wis a shorthand to word characters so one or more[a-zA-Z_0-9]

Answer 2

这不是一个格式良好的正则表达式。您需要添加分隔符：

<?php
    $text = '<article about="about_text" typeof="sioc:Item foaf:Document" class="node node-bildergalerie node-published node-not-promoted node-not-sticky author-lalala odd clearfix" id="node-bildergalerie-6835">';
    $search_for = '/(author\-.*?)\s/';
    $replace = '';
    print preg_replace($search_for, $replace, $text);
?>

在这个小提琴中检查一下：http: //codepad.org/WSNCktk0