We define some PCRE regex functions. They all have a preg prefix. preg_split- splits a string by regex pattern preg_match- performs a regex match preg_replace- search and replace string by regex pattern preg_grep- returns array entries that match the regex pattern Next we will have an ex...
mb_ereg() mb_eregi_replace() mb_eregi() mb_regex_encoding() mb_regex_set_options() mb_split() 使用PERL兼容规则的函数有: preg_grep() preg_replace_callback() preg_match_all() preg_match() preg_quote() preg_split() preg_replace() 定界符: POSIX兼容正则没有定界符,函数的相应参数会被认...
and I needed it to be fast, and accept pretty much all input. The regex above won't work when strlen($chars) == 0. I came up with this, admittedly pretty horrible-looking code, that is quite fast:<?phpfunction RemoveChars($string, $chars){ return isset($chars{0}) ? str_replace...
n? Matches any string that contains zero or one occurrences of n n{x} Matches any string that contains a sequence of X n's n{x,y} Matches any string that contains a sequence of X to Y n's n{x,} Matches any string that contains a sequence of at least X n'sNote: If your exp...
regexReplace(string $pattern, string $replacement [, string $options = 'msr'])Replaces all occurrences of $pattern in $str by $replacement. An alias for mb_ereg_replace(). Note that the 'i' option with multibyte patterns in mb_ereg_replace() requires PHP 5.6+ for correct results. This...
Do a case-insensitive search for "w3schools" in a stringDo a case-insensitive count of the number of occurrences of "ain" in a stringReplace "Microsoft" with "W3Schools" in a string PHP Form Validation PHP Form Validation PHP Date and Time ...
regex_replace(string $str, string $pattern, string $replacement, string $options, string $delimiter): string↑ Replaces all occurrences of $pattern in $str by $replacement.Parameters:string $str The input string. string $pattern The regular expression pattern. string $replacement The string ...
自PHP 5.3.0起,POSIX 正则表达式扩展被废弃。在 POSIX 正则和 PCRE 正则之间有一些不同,本页列出了在转向PCRE 时最显著的需要知道的不同点。 PCRE 函数需要模式以分隔符闭合。 不像POSIX,PCRE 扩展没有专门用于大小写不敏感匹配的函数。取而代之的是,支持使用i(PCRE_CASELESS)模式修饰符完成同样的工作。 其他...
* Convert all tabs to spaces * * This prevents strings like this: ja vascript * NOTE: we deal with spaces between characters later. * NOTE: preg_replace was found to be amazingly slow here on * large blocks of data, so we use str_replace. ...
Replaces all occurrences of needle in haystack with new_needle Can take an array as almost any part substr_replace( ) Replaces a particular substring based on its position string substr_replace( string string, string replacement, int start, int [length] ) Signed??? <?php $name =...