Backend DevelopmentPHP TutorialCommonly used PHP various verification regular expression programs_PHP tutorialCommonly used PHP various verification regular expression programs_PHP tutorial
Commonly used PHP various verification regular expression programs
| The code is as follows | Copy code |
| class validator { /** * Checks that a field is exactly the right length. * Constructer PHP4 */ Function validator() { } /** * check a number optional -,+,. values * @param string * @return boolean */ Function is_numeric($val) { return (bool)preg_match('/^[-+]?[0-9]*.?[0-9]+$/', $val); } /** * valid email * @param string * @return boolean */ Function is_email($val) { return (bool)(preg_match("/^([a-z0-9+_-]+)(.[a-z0-9+_-]+)*@([a-z0-9-]+. )+[a-z]{2,6}$/i", $val)); } /** * Valid URL or web address * @param string * @return boolean */ Function is_url($val) { return (bool)preg_match("^((((https?|ftps?|gopher|telnet|nntp)://)|(mailto:|news:))(%[0-9A-Fa-f]{2 }|[-()_.!~*';/?:@&=+$,A-Za-z0-9])+)([).!';/?:,][[:blank: ]])?$", $val); } /** * Valid IP address * @param string * @return boolean */ Function is_ipaddress($val) { return (bool)preg_match("/^(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?).(25[0 -5]|2[0-4][0-9]|[01]?[0-9][0-9]?).(25[0-5]|2[0-4][0- 9]|[01]?[0-9][0-9]?).(25[0-5]|2[0-4][0-9]|[01]?[0-9][ 0-9]?)$/", $val); } /** * Matches only alpha letters * @param string * @return boolean */ Function is_alpha($val) { return (bool)preg_match("/^([a-zA-Z])+$/i", $val); } /** * Matches alpha and numbers only * @param string * @return boolean */ function is_alphanumeric($val) { return (bool)preg_match("/^([a-zA-Z0-9])+$/i", $val); } /** * Matches alpha ,numbers,-,_ values * @param string * @return boolean */ function is_alphanumericdash($val) { return (bool)preg_match("/^([-a-zA-Z0-9_-])+$/i", $val); } /** * Matches alpha and dashes like -,_ * @param string * @return boolean */ function is_alphadash($val) { return (bool)preg_match("/^([A-Za-z_-])+$/i", $val); } /** *Matches exactly number * @param string * @return boolean */ function is_integer($val) { return is_int($val); } /** * Valid Credit Card * @param string * @return boolean */ function is_creditcard($val) { return (bool)preg_match("/^((4d{3})|(5[1-5]d{2})|(6011)|(7d{3}))-?d{4}-?d{4}-?d{4}|3[4,7]d{13}$/", $val); } /** * check given string length is between given range * @param string * @return boolean */ function is_rangelength($val, $min = '', $max = '') { return (strlen($val) >= $min and strlen($val) } /** *Check the string length has minimum length * @param string * @return boolean */ function is_minlength($val, $min) { return (strlen($val) >= (int)$min); } /** * check string length exceeds maximum length * @param string * @return boolean */ function is_maxlength($val, $max) { return (strlen($val) } /** * check given number exceeds max values * @param string * @return boolean */ function is_maxvalue($number,$max) { return ($number >$max); } /** * check given number below value * @param string * @return boolean */ function is_minvalue($number) { return ($number } /** * check given number between given values * @param string * @return boolean */ function is_rangevalue($number,$min,$max) { return ($number >$min and $number } /** * check for exactly length of string * @param string * @return boolean */ function is_length($val, $length) { return (strlen($val) == (int)$length); } /** * check decimal with . is optional and after decimal places up to 6th precision * @param string * @return boolean */ function is_decimal($val) { return (bool)preg_match("/^d+(.d{1,6})?$/'", $val); } /** * Valid hexadecimal color ,that may have #, * @param string * @return boolean */ function is_hexcolor($color) { return (bool)preg_match('/^#?+[0-9a-f]{3}(?:[0-9a-f]{3})?$/i', $color); } /** * Matches againest given regular expression ,including delimeters * @param string * @return boolean */ function is_regex($val, $expression) { return (bool)preg_match($expression, (string )$val); } /** * compares two any kind of values ,stictly * @param string * @return boolean */ function is_matches($val, $value) { return ($val === $value); } /** * check if field empty string ,orject,array * @param string * @return boolean */ function is_empty($val) { return in_array($val, array(null, false, '', array()), true); } /** * Check if given string matches any format date * @param string * @return boolean */ function is_date($val) { return (strtotime($val) !== false); } /** * check given string againest given array values * @param string * @return boolean */ function is_enum($val, $arr) { return in_array($val, $arr); } /** * Checks that a field matches a v2 md5 string * @param string * @return boolean */ function is_md5($val) { return (bool)preg_match("/[0-9a-f]{32}/i", $val); } /** * Matches base64 enoding string * @param string * @return boolean */ function is_base64($val) { return (bool)!preg_match('/[^a-zA-Z0-9/+=]/', $val); } /** * check if array has unique elements,it must have minimum one element * @param string * @return boolean */ function is_unique($arr) { $arr = (array )$arr; $count1 = count($arr); $count2 = count(array_unique($arr)); return (count1 != 0 and (count1 == $count2)); } /** * Check is rgb color value * @param string * @return boolean */ function is_rgb($val) { return (bool)preg_match("/^(rgb(s*b([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])bs*,s*b([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])bs*,s*b([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])bs*))|(rgb(s*(d?d%|100%)+s*,s*(d?d%|100%)+s*,s*(d?d%|100%)+s*))$/", $val); } /** * is given field is boolean value or not * @param string * @return boolean */ function is_boolean($val) { $booleans = array(1, 0, '1', '0', true, false, true, false); $literals = array('true', 'false', 'yes', 'no'); foreach ($booleans as $bool) { if ($val === $bool) return true; } return in_array(strtolower($val), $literals); } /** * A token that don't have any white space * @param string * @return boolean */ function is_token($val) { return (bool)!preg_match('/s/', $val); } /** * Checks that a field is exactly the right length. * @param string value * @link http://php.net/checkdnsrr not added to Windows until PHP 5.3.0 * @return boolean */ function is_emaildomain($email) { return (bool)checkdnsrr(preg_replace('/^[^@]++@/', '', $email), 'MX'); } /** * Matches a phone number that length optional numbers 7,10,11 * @param string * @return boolean */ function is_phone($number, $lengths = null) { if (!is_array($lengths)) { $lengths = array(7, 10, 11); } $number = preg_replace('/D+/', '', $number); return in_array(strlen($number), $lengths); } /** * check given sting is UTF8 * @param string * @return boolean */ function is_utf8($val) { return preg_match('%(?: [xC2-xDF][x80-xBF] |xE0[xA0-xBF][x80-xBF] |[xE1-xECxEExEF][x80-xBF]{2} |xED[x80-x9F][x80-xBF] |xF0[x90-xBF][x80-xBF]{2} |[xF1-xF3][x80-xBF]{3} |xF4[x80-x8F][x80-xBF]{2} )+%xs', $val); } /** * Given sting is lower cased * @param string * @return boolean */ function is_lower($val) { return (bool)preg_match("/^[a-z]+$/", $val); } /** * Given string is upper cased? * @param string * @return boolean */ function is_upper($val) { return (bool)preg_match("/^[A-Z]+$/", $val); } /** * Checks that given value matches following country pin codes. * at = austria * au = australia * ca = canada * de = german * ee = estonia * nl = netherlands * it = italy * pt = portugal * se = sweden * uk = united kingdom * us = united states * @param String * @param String * @return boolean */ function is_pincode($val, $country = 'us') { $patterns = array('at' => '^[0-9]{4,4}$', 'au' => '^[2-9][0-9]{2,3}$', 'ca' => '^[a-zA-Z].[0-9].[a-zA-Z].s[0-9].[a-zA-Z].[0-9].', 'de' => '^[0-9]{5,5}$', 'ee' => '^[0-9]{5,5}$', 'nl' => '^[0-9]{4,4}s[a-zA-Z]{2,2}$', 'it' => '^[0-9]{5,5}$', 'pt' => '^[0-9]{4,4}-[0-9]{3,3}$', 'se' => '^[0-9]{3,3}s[0-9]{2,2}$', 'uk' => '^([A-Z]{1,2}[0-9]{1}[0-9A-Z]{0,1}) ?([0-9]{1}[A-Z]{1,2})$', 'us' => '^[0-9]{5,5}[-]{0,1}[0-9]{4,4}$'); if (!array_key_exists($country, $patterns)) return false; return (bool)preg_match("/" . $patterns[$country] . "/", $val); } /** * Check given url really exists? * @param string * @return boolean */ function is_urlexists($link) { if (!$this->is_url($link)) return false; return (bool)@fsockopen($link, 80, $errno, $errstr, 30); } /** * Check given sting has script tags * @param string * @return boolean */ function is_jssafe($val) { return (bool)(!preg_match("/<script>]*>[srn]*(<!--)?|(-->)?[srn]*</script>/", $val)); } /** * given sting has html tags? * @param string * @return boolean */ function is_htmlsafe($val) { return (bool)(!preg_match("/.*$1>/", $val)); } /** * check given sring has multilines * @param string * @return boolean */ function is_multiline($val) { return (bool)preg_match("/[nrt]+/", $val); } /** * check given array key element exists? * @param string * @return boolean */ function is_exists($val, $arr) { return isset($arr[$val]); } /** * is given string is ascii format? * @param string * @return boolean */ function is_ascii($val) { return !preg_match('/[^x00-x7F]/i', $val); } /** * Checks given value again MAC address of the computer * @param string value * @return boolean */ function is_macaddress($val) { return (bool)preg_match('/^([0-9a-fA-F][0-9a-fA-F]:){5}([0-9a-fA-F][0-9a-fA-F])$/', $val); } /** * Checks given value matches us citizen social security number * @param string * @return boolean */ function is_usssn($val) { return (bool)preg_match("/^d{3}-d{2}-d{4}$/", $val); } /** * Checks given value matches date de * @param string * @return boolean */ function is_dateDE($date) { return (bool)preg_match("/^dd?.dd?.ddd?d?$/", $date); } /** * Checks given value matches us citizen social security number * @param string * @return boolean */ function is_dateISO($date) { return (bool)preg_match("/^d{4}[/-]d{1,2}[/-]d{1,2}$/", $date); } /** * Checks given value matches a time zone * +00:00 | -05:00 * @param string * @return boolean */ function is_timezone($val) { return (bool)preg_match("/^[-+]((0[0-9]|1[0-3]):([03]0|45)|14:00)$/", $val); } /** * Time in 24 hours format with optional seconds * 12:15 | 10:26:59 | 22:01:15 * @param string * @return boolean */ function is_time24($val) { return (bool)preg_match("/^(([0-1]?[0-9])|([2][0-3])):([0-5]?[0-9])(:([0-5]?[0-9]))?$/", $val); } /** * Time in 12 hours format with optional seconds * 08:00AM | 10:00am | 7:00pm * @param string * @return boolean */ function is_time12($val) { return (bool)preg_match("/^([1-9]|1[0-2]|0[1-9]){1}(:[0-5][0-9][aApP][mM]){1}$/", $val); } } |
|
What are some common problems that can cause PHP sessions to fail?Apr 25, 2025 am 12:16 AMReasons for PHPSession failure include configuration errors, cookie issues, and session expiration. 1. Configuration error: Check and set the correct session.save_path. 2.Cookie problem: Make sure the cookie is set correctly. 3.Session expires: Adjust session.gc_maxlifetime value to extend session time.
How do you debug session-related issues in PHP?Apr 25, 2025 am 12:12 AMMethods to debug session problems in PHP include: 1. Check whether the session is started correctly; 2. Verify the delivery of the session ID; 3. Check the storage and reading of session data; 4. Check the server configuration. By outputting session ID and data, viewing session file content, etc., you can effectively diagnose and solve session-related problems.
What happens if session_start() is called multiple times?Apr 25, 2025 am 12:06 AMMultiple calls to session_start() will result in warning messages and possible data overwrites. 1) PHP will issue a warning, prompting that the session has been started. 2) It may cause unexpected overwriting of session data. 3) Use session_status() to check the session status to avoid repeated calls.
How do you configure the session lifetime in PHP?Apr 25, 2025 am 12:05 AMConfiguring the session lifecycle in PHP can be achieved by setting session.gc_maxlifetime and session.cookie_lifetime. 1) session.gc_maxlifetime controls the survival time of server-side session data, 2) session.cookie_lifetime controls the life cycle of client cookies. When set to 0, the cookie expires when the browser is closed.
What are the advantages of using a database to store sessions?Apr 24, 2025 am 12:16 AMThe main advantages of using database storage sessions include persistence, scalability, and security. 1. Persistence: Even if the server restarts, the session data can remain unchanged. 2. Scalability: Applicable to distributed systems, ensuring that session data is synchronized between multiple servers. 3. Security: The database provides encrypted storage to protect sensitive information.
How do you implement custom session handling in PHP?Apr 24, 2025 am 12:16 AMImplementing custom session processing in PHP can be done by implementing the SessionHandlerInterface interface. The specific steps include: 1) Creating a class that implements SessionHandlerInterface, such as CustomSessionHandler; 2) Rewriting methods in the interface (such as open, close, read, write, destroy, gc) to define the life cycle and storage method of session data; 3) Register a custom session processor in a PHP script and start the session. This allows data to be stored in media such as MySQL and Redis to improve performance, security and scalability.
What is a session ID?Apr 24, 2025 am 12:13 AMSessionID is a mechanism used in web applications to track user session status. 1. It is a randomly generated string used to maintain user's identity information during multiple interactions between the user and the server. 2. The server generates and sends it to the client through cookies or URL parameters to help identify and associate these requests in multiple requests of the user. 3. Generation usually uses random algorithms to ensure uniqueness and unpredictability. 4. In actual development, in-memory databases such as Redis can be used to store session data to improve performance and security.
How do you handle sessions in a stateless environment (e.g., API)?Apr 24, 2025 am 12:12 AMManaging sessions in stateless environments such as APIs can be achieved by using JWT or cookies. 1. JWT is suitable for statelessness and scalability, but it is large in size when it comes to big data. 2.Cookies are more traditional and easy to implement, but they need to be configured with caution to ensure security.
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.
ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment
Zend Studio 13.0.1
Powerful PHP integrated development environment
MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.
WebStorm Mac version
Useful JavaScript development tools
