PHP validation functions (including Email,url, date, etc.)

<?PHP/** * [email protected] Zouhao * Some verification methods*/  /** * is the mobile number * * @param string $phone phone number * @return Boolean*/  functionIs_phone ($phone) {      if(strlen($phone)! = 11 | | !Preg_match('/^1[3|4|5|8][0-9]\d{4,8}$/',$phone )) {          return false; } Else {          return true; }  }  /** * Verify that strings are numbers, letters, Chinese, and underscores * @param string $username * @return bool*/  functionIs_check_string ($str){      if(Preg_match('/^[\x{4e00}-\x{9fa5}\w_]+$/u ',$str)){          return true; }Else{          return false; }  }  /** * is a valid email * @param sting $email * @return Boolean*/  functionIs_email ($email){      if(Filter_var ($email,filter_validate_email)) {          return true; } Else {          return false; }  }/** * e-mail Verification can also use this method * This method for reference Ecshop*/  functionIs_email ($user _email){    $chars= "/^" ([a-z0-9+_]|\\-|\\.) [Email protected] (([a-z0-9_]|\\-) +\\.) +[a-z]{2,6}\$/i "; if(Strpos($user _email, ' @ ')!==false&&Strpos($user _email, ‘.‘) !==false)    {        if(Preg_match($chars,$user _email))        {            return true; }        Else        {            return false; }    }    Else    {        return false; }}  /** * is a valid URL * @param string $url * @return Boolean*/  functionIs_url ($url){      if(Filter_var ($url,Filter_validate_url)) {          return true; } Else {          return false; }  }  /** * is a valid IP address * @param string $ip * @return Boolean*/  functionIS_IP ($ip){      if(Ip2long($ip)) {          return true; } Else {          return false; }  }  /** * is an integer * @param int $number * @return Boolean*/  functionIs_number ($number){      if(Preg_match('/^[-\+]?\d+$/',$number)){          return true; }Else{          return false; }  }  /** * is a positive integer * @param int $number * @return Boolean*/  functionIs_positive_number ($number){      if(Ctype_digit($number)){          return true; }Else{          return false; }  }  /** * is a decimal * @param float $number * @return Boolean*/  functionIs_decimal ($number){      if(Preg_match('/^[-\+]?\d+ (\.\d+)? $/',$number)){          return true; }Else{          return false; }  }  /** * is a positive decimal number * @param float $number * @return Boolean*/  functionIs_positive_decimal ($number){      if(Preg_match('/^\d+ (\.\d+)? $/',$number)){          return true; }Else{          return false; }  }  /** * is English * @param string $str * @return Boolean*/  functionIs_english ($str){      if(Ctype_alpha($str))          return true; Else          return false; }  /** * is Chinese * @param string $str * @return Boolean*/  functionIs_chinese ($str){      if(Preg_match('/^[\x{4e00}-\x{9fa5}]+$/u ',$str))          return true; Else           return false; }  /** * To determine if it is a picture * @param string $file picture file path * @return Boolean*/  functionIs_image ($file){      if(file_exists($file) &&getimagesize($file===false)){          return false; }Else{          return true; }  }  /** * is a valid ID (supports 15-bit and 18-bit) * @param string $card * @return Boolean*/  functionIs_card ($card){      if(Preg_match('/^[1-9]\d{7} ((0\d) | ( 1[0-2]) (([0|1|2]\d) |3[0-1]) \d{3}$/',$card)||Preg_match('/^[1-9]\d{5}[1-9]\d{3} ((0\d) | ( 1[0-2]) (([0|1|2]\d) |3[0-1]) \d{4}$/',$card))          return true; Else           return false; }  /** * Verify that the date format is correct * @param string $date * @param string $format * @return Boolean*/  functionIs_date ($date,$format= ' y-m-d '){      $t=date_parse_from_format ($format,$date); if(Empty($t[' Errors '])){          return true; }Else{          return false; }  }  ?>

Some validation functions have just been collected.

PHP validation functions (including Email,url, dates, and so on)