如何获得多个匹配正则表达式

时间:2012-10-10 19:53:31

标签: php regex

我正在尝试解析特殊包含语句的文本以提取特定文件。

我有以下功能:

function parse_includes($text, $directory = 'includes/') {
preg_match_all('/\[include:([^,]+)\]/', $text, $matches);

foreach($matches[1] as $key => $filename) {
    ob_start();
    include($directory.$filename);
    $include = ob_get_contents();
    ob_end_clean();
    $text = str_replace($matches[0][$key], $include, $text);
}

return $text;

}

传递这个变量:

$text = 'Below is the footer<br><br>[include:sidebar.php] <br><br> [include:footer.php]<br>';

并回应它:

echo parse_includes($text);

我收到此错误:

Warning: include(includes/sidebar.php] <br><br> [include:footer.php) [function.include]: failed to open stream:

如果只有一个[include: *',则按预期工作。

如何修改我的REGEX?请注意HTML或空格如何围绕两侧的括号。

1 个答案:

答案 0 :(得分:1)

正则表达式默认为 greedy ,这意味着它们会尝试匹配尽可能多的字符。事实证明,([^,]+)匹配此字符串:

sidebar.php] <br><br> [include:footer.php

您可以更改正则表达式以使用 relucant +

preg_match_all('/\[include:([^,]+?)\]/', $text, $matches);

这会使它尽可能少地匹配,而不是尽可能多。或者,您可以禁止匹配字符串中的左括号:

preg_match_all('/\[include:([^,[]+)\]/', $text, $matches);