- PHP Programs
- PHP Sum of Digits Program
- PHP Even Odd Program
- PHP Prime Number Program
- PHP Table of Number Program
- PHP Factorial Program
- PHP Armstrong Number Program
- PHP Palindrome Number Program
- PHP Fibonacci Series Program
- PHP Reverse Number Program
- PHP Reverse String Program
- PHP Swapping Two Numbers Program
- PHP Adding Two Numbers Program
- PHP Subtracting Two Numbers Program
- PHP Area of Triangle Program
- PHP Area of Rectangle Program
- PHP Leap Year Program
- PHP Alphabet Triangle Program using Methods
- PHP Alphabet Triangle Pattern Program
- PHP Number Triangle Program
- PHP Star Triangle Program
- PHP array_arsort( ) function
- PHP Array asort() Function
- PHP Array changekeycase() Function
- PHP Array column() Function
- PHP Array combine() Function
- PHP Array compact() Function
- PHP Array count() Function
- PHP Array count_values() Function
- PHP array_slice() Function
- PHP Array current() Function
- PHP array_diff_assoc() Function
- PHP array_diff() Function
- PHP array_diff_key() Function
- PHP array_diff_uassoc() Function
- PHP array_diff_ukey() Function
- PHP array each() Function
- PHP Array end() Function
- PHP Array extract() Function
- PHP array_fill() Function
- PHP array_fill_keys() Function
- PHP array_filter() Function
- PHP Array flip() Function
- PHP in_array() Function
- PHP array_intersect_assoc() Function
- PHP array_intersect() Function
- PHP array_intersect_key() Function
- PHP array_intersect_uassoc() Function
- PHP array_intersect_ukey() Function
- PHP array_key_exists() Function
- PHP array_key_first() Function
- PHP Array key() Function
- PHP array_key_last() Function
- PHP array_keys() Function
- PHP Array krsort() Function
- PHP Array ksort() Function
- PHP Array list() Function
- PHP array_map() Function
- PHP array_merge() Function
- PHP array_merge_recursive() Function
- PHP array_multisort() Function
- PHP Array natcasesort() Function
- PHP Array natsort() Function
- PHP Array next() Function
- PHP array_pad() Function
- PHP array_pop() Function
- PHP Array pos() Function
- PHP Array prev() Function
- PHP array_product() Function
- PHP array_push() Function
- PHP array_rand() Function
- PHP Array range() Function
- PHP array_reduce() Function
- PHP array_replace() Function
- PHP array_replace_recursive() Function
- PHP Array reset() Function
- PHP array_reverse() Function
- PHP Array rsort() Function
- PHP array_search() Function
- PHP array_shift() Function
- PHP Array shuffle() Function
- PHP Array sizeof() Function
- PHP Array sort() Function
- PHP array_splice() Function
- PHP array_sum() Function
- PHP Array uasort() Function
- PHP array_udiff_assoc() Function
- PHP array_udiff() Function
- PHP array_udiff_uassoc() Function
- PHP array_uintersect_assoc() Function
- PHP array_uintersect() Function
- PHP array_uintersect_uassoc() Function
- PHP Array uksort() Function
- PHP array_unique() Function
- PHP array_unshift() Function
- PHP Array usort() Function
- PHP array_values() Function
- PHP array_walk() Function
- addcslashes()
- addslashes()
- bin2hex()
- chop()
- chr()
- chunk_split()
- convert_cyr_string()
- convert_uudecode()
- convert_uuencode()
- count_chars()
- crc32()
- crypt()
- echo()
- PHP explode() function
- fprint()
- get_html_translation_table()
- hebrev()
- hex2bin()
- htmlentities()
- html_entity_decode()
- htmlspecialchars()
- htmlspecialchars_decode()
- PHP Implode() Function
- Join()
- Levenshtein()
- Lcfirst()
- localeconv()
- ltrim()
- md5()
- md5_files()
- metaphone()
- money_format()
- nl2br()
- nl_langinfo()
- number_format()
- ord()
- parse_str()
- print()
- printf()
- quoted_printable_decode()
- quoted_printable_encode()
- setlocale()
- sha1()
- sha1_file()
- similar_text()
- quotemeta()
- Soundex()
- rtrim()
- sprintf()
- sscanf()
- strcasecmp()
- strchr()
- strcmp()
- strcoll()
- strcspn()
- stripcslashes()
- stripos()
- stristr()
- strlen()
- strncasecmp()
- strnatcasecmp()
- strnatcmp()
- strncmp()
- strpbrk()
- strripos()
- strrpos()
- strpos()
- strrchr()
- strrev()
- strspn()
- strstr()
- strtok()
- strtolower()
- strtoupper()
- strtr()
- str_getcsv()
- str_ireplace()
- str_pad()
- str_repeat()
- PHP str_replace() function
- str_rot13()
- str_shuffle()
- str_split()
- strcoll()
- strip_tags()
- str_word_count()
- substr()
- substr_compare()
- substr_count()
- substr_replace()
- trim()
- ucfirst()
- ucwords()
- vprintf()
- vsprintf()
- wordwrap()
- vfprintf()
- PHP Date()/Time() Functions
- PHP checkdate() function
- PHP date() function
- PHP date_add() function
- PHP date_create() function
- PHP date_date_set() function
- PHP date_default_timezone_get() function
- PHP date_default_timezone_set() function
- PHP date_diff() function
- PHP date_format() function
- PHP date_get_last_errors() function
- PHP date_interval_format() function
- PHP date_isodate_set() function
- PHP date_modify() function
- PHP date_offset_get() function
- PHP date_parse_from_format() function
- PHP date_parse() function
- PHP date_sub() Function
- PHP date_sun_info() Function
- PHP date_sunrise() Function
- PHP date_sunset() Function
- PHP date_time_set() Function
- PHP date_timestamp_get() Function
- PHP date_timezone_get() Function
- PHP date_timestamp_set() Function
- PHP date_timezone_set() Function
- PHP getdate() Function
- PHP gettimeofday() Function
- PHP gmdate() Function
- PHP gmmktime() Function
- PHP gmstrftime() Function
- PHP idate() Function
- PHP localtime() Function
- PHP microtime() Function
- PHP mktime() Function
- PHP strftime() Function
- PHP strtotime() Function
- PHP time() Function
- PHP timezone_abbreviations_list() Function
- PHP timezone_identifiers_list() Function
- PHP timezone_location_get() Function
- PHP timezone_name_from_abbr() Function
- PHP timezone_name_get() Function
- PHP timezone_offset_get() Function
- PHP timezone_open() Function
- PHP timezone_version_get() Function
- require_once
- include_once
- MVC Architecture
- Abstraction in PHP
- PHP vs. JavaScript
- PHP vs. HTML
- PHP vs. Node.js
- PHP vs Python
- PhpStorm
- PHP PDO
- Top 10 PHP frameworks
- phpMyAdmin
- Count All Array Elements
- Create Newline
- Get Current Page URL
- Remove First Element from Array
- Remove Last Element from Array
- Change Date Format
- Get IP Address
- PHP MySql Login System
- var_dump() function
- PHP Regular Expressions
- preg_match() function
- preg_replace() function
- isset() function
- print_r() function
- Types of Errors in PHP
- Display All Errors
- PHP error_reporting()
- PHP header()
- PHP unset() function
- Get & Post Methods
- Form Validation
- Exception Handling in PHP
- PHP try-catch
- PHP Pagination
- What is a Website
- How to make a website
- How to cite a website in APA format
- How to cite a website in MLA format
- How to download video from the website
- PHP array_push
- Difference between break and continue in PHP
- How to Install Composer on Windows
- PHPMyAdmin Login
- PHP alert
- Creation of custom php.ini file in CPanel
- Downgrade php 7.4 to 7.3 Ubuntu
- Multiple File Upload using Dropzone JS in PHP
- PHP Dropzone File Upload on Button Click
- PHP find value in an array
- PHP Codeigniter 3 Ajax Pagination using Jquery
- How to Convert array into string in PHP
- PHP Codeigniter 3 Create Dynamic Tree View using Bootstrap Treeview JS
- CRUD Operation using PHP & Mongodb
- PHP Ajax Multiple Image Upload
- PHP Multidimensional Array Search By Value
- PHP urlencode() Function
- Image Gallery CRUD using PHP MySQL
- How to get selected option value in PHP
- PHP Contact Form
- PHP string Concatenation
- PHP Laravel 5.6 - Rest API with Passport
- PHP compare dates
- PHP Registration Form
- PHP ternary operator
- PHP basename() Function
- Why do we need Interfaces in PHP
- file_put_contents() Function in PHP
- Is_array() Function in PHP
- How to Use PHP Serialize() and Unserialize() Function
- PHP Unset() vs Unlink() Function
- PHP 5 vs PHP 7
- PHP Imagearc() Function
- PHP Imagecharup() Function
- PHP Imagecolortransparent() Function
- PHP Imagechar() Function
- PHP Imagecreate() Function
- PHP Imagecolorallocate() Function
- PHP Image createtruecolor( ) Function
- PHP Imagestring() Function
- Father of PHP
- get vs post method in PHP
- PHP append to array
- fpassthru() Function in PHP
- Imagick::borderImage() method in PHP
- Imagick rotateImage() Function
- Imagick transposeImage() Function
- PHP Projects
- Imagick floodFillPaintImage() Function
- Imagick::charcoalImage() PHP
- Imagick adaptiveBlurImage() Function
- Imagick addImage() Function
- Imagick addNoiseImage() Function
- PHP Type Casting and Conversion of an Object to an Object of other class
- PHP PEAR
- PHP STR_CONTAINS()
- Multiple Inheritance in PHP
- What is a PHP Developer
- PHP ob_start() Function
- PHP Beautifier
- PHP imagepolygon() Function
- Free PHP Web Hosting
- PHP Adminer
- PHP empty() Function
- What is PHP-FPM
- PHP IDE and Code Editor Software
- PHP file_get_contents() Function
- PHP sleep() Function
- PHP server
- PHP GMP Functions Detail Reference
- PHP gmp_abs() Function
- PHP gmp_add() Function
- PHP gmp_and()Functions
- PHP GMP gmp_clrbit() Function
- PHP GMP gmp_cmp() Function
- PHP GMP gmp_com() Function
- PHP gmp_div_q() Function
- PHP gmp_div_qr() Function
- PHP gmp_or() function
- PHP gmp_divexact() Function
- PHP gmp_export() Function
- PHP gmp_fact() Function
- PHP gmp_gcd() Function
- PHP gmp_import() Function
- PHP gmp_intval() Function
- PHP gmp_invert() Function
- PHP gmp_jacobi() Function
- PHP gmp_legendre() Function
- PHP gmp_mod() Function
- PHP gmp_prob_prime() function
- PHP gmp_random_bits() function
- PHP gmp_random_range() function
- PHP gmp_root() function
- PHP gmp_rootrem() function
- PHP gmp_random_seed() function
- PHP gmp_scan0() function
- PHP gmp_scan1() function
- PHP gmp_setbit() function
- PHP GMP gmp_testbit() Function
- PHP gmp_random() function
- PHP Array Chunk() Function
- PHP gmp_xor() function
- How to create html table with a while loop in PHP
- How to Encrypt or Decrypt a String in PHP
- What is Output Buffering in PHP
- CodeSlide PHP Script
- PHP Login Form
- Sticky Form in PHP
- PHP Frameworks
- PHP Versions
- PHP Database Connection
- PHP Syntax
- Difference between Session and Cookies in PHP
- PHP Anonymous Functions
- PHP Built-in Functions
- Advantages and Disadvantages of PHP
- CRUD Operations in PHP and MySQL
- AJAX integration in PHP
- How to run a PHP file using Visual Studio Code
- How to connect PHP to MySQL
PHP is_null() functionLast Updated : 17 Mar 2025 By using the is_null function, we can check whether the variable is NULL or not. This function was introduced in PHP 4.0.4. SYNATX:Parameter
Return Type:The PHP is_null() function returns true if var is null, otherwise false. Important Note:We can unset the variable value by using the unset function. Example 1 Example 2 Example 3 Next TopicPHP Special Types |
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