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What is the usage of php regex?

藏色散人
藏色散人 Original
2021-10-27 09:15:12 2275browse

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


      

preg_mactch_all

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