What is the usage of php regex?-PHP Problem-php.cn

What is the usage of php regex?

藏色散人

Release： 2023-03-13 14:02:02

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php正则的用法：1、创建一个PHP示例文件；2、定义一个数组；3、通过正则表达式“preg_grep("/^(\d+)?\.\d+$/",$array);”进行替换即可。

What is the usage of php regex?

本文操作环境：Windows7系统、PHP7.1版、DELL G3电脑

php正则的使用

函数	描述
preg_filter	执行一个正则表达式搜索和替换
preg_grep	返回匹配模式的数组条目
preg_last_error	返回最后一个PCRE正则执行产生的错误代码
preg_match_all	执行一个全局正则表达式匹配
preg_match	执行一个正则表达式匹配
preg_quote	转义正则表达式字符
preg_replace_callback_array	执行一个正则表达式搜索并且使用一个回调进行替换
preg_replace_callback	执行一个正则表达式搜索并且使用一个回调进行替换
preg_replace	执行一个正则表达式的搜索和替换
preg_split	通过一个正则表达式分隔字符串

preg_filter

preg_grep

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preg_mactch_all

PHP 
 Title: Programming Language";
preg_match_all ("/(.*)<\/b>/U", $userinfo, $pat_array);
print_r($pat_array[0]);
?>

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bold textclick me";
 
preg_match_all("/(<([\w]+)[^>]*>)(.*?)(<\/\\2>)/", $html, $matches, PREG_SET_ORDER);
 
foreach ($matches as $val) {
    echo "matched: " . $val[0] . "\n";
    echo "part 1: " . $val[1] . "\n";
    echo "part 2: " . $val[2] . "\n";
    echo "part 3: " . $val[3] . "\n";
    echo "part 4: " . $val[4] . "\n\n";
}
?>

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