Php Regular Expression Match

The characters you need to escape in the PHP tutorial regular expressions are as follows: $^* () +={}[]|/:<>. "Note: Perl style expressions require/start and end, such as:/food/table matching characters Food Perl modifiers are as follows: I complete a case-insensitive search G Find all occurrences (all occurrences, complete global search) m treats a string as multiline (m means multiple (listbox)). By default, ^ and $ ...

^ s * | s * $ Comment: Can be used to delete the first line of the first line of the whitespace characters (including spaces, tabs, page breaks, etc. ), A very useful expression $ action = trim ($ _ get ['action']); if ($ action == "sub") {$ str = $ _post ['dir']; & ...

PHP Tutorials Match URL Regular expression code//This is a PHP regular expression that gets all the links in the article content $str = ""; $reg = "<a[ss]*?" (href) s*=s* (? =["']) ((["]) (? <href>[^ "']*) 2) | (? <src>[^s>]+)) [ss]*?> "...

php tutorial Regularly specify the string content Preg_match function description Although the code is small, but the code is as follows: preg_match ('/ ^ (?! string) /', 'aa') === true This is used to verify a Whether a string begins with a 'string' or not, in a perl or perl-supported regular expression language such as php, can be done with a look-ahead declaration, as the regular expression is: preg_mat. ..

php tutorial recursively get url's address code // method $ str = '<a href="http://www.jzread.com" target="_blank" name="doc3_p"> <img src = "" onload = "setImgSize (this ...

Php tutorial Chinese characters match the regular expression Chinese characters match the regular expression: [u4e00-u9fa5] Commentary: Matching Chinese is really a headache, with this expression is easy to match the double-byte characters (including Chinese characters ): [^ X00-xff] Comment: Can be used to calculate the length of the string (a double-byte character length meter 2, ascii character meter 1) * / $ str = "singlepoint single point log"; if (preg_matc ...

Ereg (PHP3, PHP4) ereg---&http://www.aliyun.com/zixun/aggregation/37954.html ">nbsp; Formal expression comparison syntax: Int ereg (string pattern, string string [, array regs]) Description: Search string for normal representation of pattern. If ...

Finding and matching php strings The functions used to find or match or locate in php are numerous and all have different meanings. Here only about the more strstr, stristr. The latter and the former function, the return value is the same, but not case-sensitive. strstr ("parent string", "substring") is used to find the first occurrence of a substring in the parent string and returns the part of the parent string that begins with the substring and ends with the parent string . Such as ec ...

PHP Tutorial Mixed Preg_replace_callback Instance application code//requirements: Add a request=xxx after all connections; This function is more flexible than preg_replace, and note that what it replaces is the contents of the entire regular expression. $content = ' <a href= http://www.jzread.com/aaa.php ' > link 1</a>

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