Php Alphanumeric

^ 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']; & ...

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 $ ...

php tutorial to verify the legitimacy of the user name regular code We verify this user name is a regular validation of letters, numbers, username, not including Chinese Oh. function funcstrnum ($ str, $ num1 = '', $ num2 = '') // alphanumeric {if ($ num1! = '' and $ num2! = '') {return (preg_match ("/ ^ [^ a-z0-9a-z _@!.-] {& q ...

Rawurlencode (PHP3, PHP4) rawurldecode---&http://www.aliyun.com/zixun/aggregation/37954.html ">nbsp; Follow the RFC1738 URL encoding syntax: string rawurlencode (String str) Description: All non-alphabetic characters except-_.

UrlEncode (PHP3, PHP4) urlencode---&http://www.aliyun.com/zixun/aggregation/37954.html ">nbsp; URL-encoded string syntax: String UrlEncode (String str) Description: Add all non-alphanumeric strings except-_. In percent sign (%) followed by two confusing numbers ...

Addcslashes (PHP4 >= 4.0b4) addcslashes---&http://www.aliyun.com/zixun/aggregation/37954.html ">nbsp; Precede the specified character with the backslash syntax: string addcslashes (String str, string charlist) Description: The parameter cha ...

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