preg_match()与strpos()进行匹配查找? [英] preg_match() vs strpos() for match finding?

问题描述

对于单值检查，两者中的哪一个是首选，为什么?

For single value check, which of both is preferred and why?

$string == 'The quick brown fox jumps over the lazy dog';

if(strpos($string, 'fox') !== false){
    // do the routine
}

# versus

if(preg_match('/fox/i', $string)){
    // do the routine
}

推荐答案

相对于preg_match，我更喜欢strpos，因为执行正则表达式通常更昂贵.

I would prefer the strpos over preg_match, because regexes are generally more expensive to execute.

根据 preg_match 的官方php文档:

According to the official php docs for preg_match:

如果仅使用preg_match()，请不要使用 想检查一个字符串是否 包含在另一个字符串中.使用 strpos()或strstr()代替 会更快.

Do not use preg_match() if you only want to check if one string is contained in another string. Use strpos() or strstr() instead as they will be faster.

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