Common regular expressions are used to verify information, such as the mobile phone number of the website email address.

Provides various official and user-released code examples. For code reference, you are welcome to exchange and learn common regular expressions to verify information, such as the website email phone number.
/**
* Common regular expressions are used to verify information, such as the mobile phone number of the website email address.
*/

Class check {

/**
* Regular Expressions verify the email format
*
* @ Param string $ str the email address to be verified
* @ Return boolean
*/
Public static function isEmail ($ str ){

If (! $ Str ){
Return false;
}

Return preg_match (# [a-z0-9 & \-_.] + @ [\ w \-_] + ([\ w \-.] + )? \. [\ W \-] + # is ', $ str )? True: false;
}

/**
* Regular Expression verification URL
*
* @ Param string $ str URL to be verified
* @ Return boolean
*/
Public static function isUrl ($ str ){

If (! $ Str ){
Return false;
}

Return preg_match ('# (http | https | ftp | ftps): // ([\ w-] + \.) + [\ w-] + (/[\ w -. /? % & =] *)? # I ', $ str )? True: false;
}

/**
* Verify that the string contains Chinese Characters
*
* @ Param integer $ string the string to be verified. Note: String encoding only supports UTF-8
* @ Return boolean
*/
Public static function isChineseCharacter ($ string ){

If (! $ String ){
Return false;
}

Return preg_match ('~ [\ X {4e00}-\ x {9fa5}] ++ ~ U', $ string )? True: false;
}

/**
* Verify that the string contains invalid characters.
*
* @ Param string $ string the string to be verified
* @ Return boolean
*/
Public static function isInvalidStr ($ string ){

If (! $ String ){
Return false;
}

Return preg_match ('#[! # $ % ^ &*(){}~ "'\';:? + = <>/\ [\] + # ', $ String )? True: false;
}

/**
* Use a regular expression to verify the postal code
*
* @ Param integer $ num the zip code to be verified
* @ Return boolean
*/
Public static function isPostNum ($ num ){

If (! $ Num ){
Return false;
}

Return preg_match ('# ^ [1-9] [0-9] {5 }$ #', $ num )? True: false;
}

/**
* Regular Expression to verify the ID card number
*
* @ Param integer $ num ID card number to be verified
* @ Return boolean
*/
Public static function isPersonalCard ($ num ){

If (! $ Num ){
Return false;
}

Return preg_match ('# ^ [\ d] {15 }$ | ^ [\ d] {18 }$ #', $ num )? True: false;
}

/**
* Use regular expressions to verify IP addresses. Note: Only IPv4 addresses are allowed.
*
* @ Param string $ str IP address to be verified
* @ Return boolean
*/
Public static function isIp ($ str ){

If (! $ Str ){
Return false;
}

If (! Preg_match ('# ^ \ d {1, 3} \. \ d {1, 3} \. \ d {1, 3} \. \ d {1, 3} $ #', $ str )){
Return false;
}

$ IpArray = explode ('.', $ str );

// The real IP address cannot exceed 255 (0-255)
Return ($ ipArray [0] <= 255 & $ ipArray [1] <= 255 & $ ipArray [2] <= 255 & $ ipArray [3] <= 255 )? True: false;
}

/**
* Use a regular expression to verify the ISBN number of a publication
*
* @ Param integer $ str the ISBN number to be verified, usually composed of 13 digits
* @ Return boolean
*/
Public static function isBookIsbn ($ str ){

If (! $ Str ){
Return false;
}

Return preg_match ('# ^ 978 [\ d] {10 }$ | ^ 978-[\ d] {10 }# #', $ str )? True: false;
}

/**
* Use a regular expression to verify the mobile phone number (Mainland China)
* @ Param integer $ num the phone number to be verified
* @ Return boolean
*/
Public static function isMobile ($ num ){

If (! $ Num ){
Return false;
}

Return preg_match ('# ^ 13 [\ d] {9} $ | 14 ^ [0-9] \ d {8} | ^ 15 [0-9] \ d {8} $ | ^ 18 [0-9] \ d {8} $ #', $ num )? True: false;
}

/**
* Check whether the string is null.
*
* @ Access public
* @ Param string $ string content
* @ Return boolean
*/
Public static function isMust ($ string = null ){

// Parameter Analysis
If (is_null ($ string )){
Return false;
}

Return empty ($ string )? False: true;
}

/**
* Check the string length.
*
* @ Access public
* @ Param string $ string content
* @ Param integer $ min minimum number of strings
* @ Param integer $ max maximum number of strings
*/
Public static function isLength ($ string = null, $ min = 0, $ max = 255 ){

// Parameter Analysis
If (is_null ($ string )){
Return false;
}
// Obtain the string length
$ Length = strlen (trim ($ string ));

Return ($ length >=( int) $ min) & ($ length <= (int) $ max ))? True: false;
}
}

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