PHP preg_replace/preg_match与PHP str_replace [英] PHP preg_replace/preg_match vs PHP str_replace

问题描述

任何人都可以给我快速总结一下差异吗?

在我看来，他们俩都在做同一件事?

谢谢

解决方案

str_replace替换特定出现的字符串，例如，"foo"将仅匹配并替换该字符串:"foo". preg_replace将执行正则表达式匹配，例如"/f.{2}/"将匹配并替换"foo"，但还将匹配并"fey"，"fir"，"fox"，"f12"等.

亲自看看:

$string = "foo fighters";
$str_replace = str_replace('foo','bar',$string);
$preg_replace = preg_replace('/f.{2}/','bar',$string);
echo 'str_replace: ' . $str_replace . ', preg_replace: ' . $preg_replace;

输出为:

str_replace:酒吧战士，preg_replace:酒吧战士

:)

Can anyone give me a quick summary of the differences please?

To my mind they both do the same thing?

Thanks

解决方案

str_replace replaces a specific occurrence of a string, for instance "foo" will only match and replace that: "foo". preg_replace will do regular expression matching, for instance "/f.{2}/" will match and replace "foo", but also "fey", "fir", "fox", "f12", etc.

[EDIT]

See for yourself:

$string = "foo fighters";
$str_replace = str_replace('foo','bar',$string);
$preg_replace = preg_replace('/f.{2}/','bar',$string);
echo 'str_replace: ' . $str_replace . ', preg_replace: ' . $preg_replace;

The output is:

str_replace: bar fighters, preg_replace: bar barhters

:)

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