chunk_split — Split a string into smaller chunks. The str_replace() function replaces the searched string in a string. The rtrim() function removes the whitespaces from the right part of the string. Simple and Easy. I have designed and developed CodephpOnline & CodephpOnline Wiki platform to expatiate my coding and technology learning experiences. Strings are a sequence of characters. Start : The start in the string from which the characters are to be extracted. So in this case, ‘0xFF’ is converted to its integer equivalent which is 255. The following section contains a list of PHP string functions along with a brief description. Operators are symbols that tell the PHP processor to perform certain actions. 2. strlen() definition: The strlen() function returns to us the number of characters in the string it’s given. PHP Array Introduction. The long string is supported in PHP, in fact, there is no practical bound to the size of strings. of each newline in a string, Returns the ASCII value of the first character of a string, Converts a quoted-printable string to an 8-bit string, Converts an 8-bit string to a quoted printable string, Removes whitespace or other characters from the right side of a string, Calculates the similarity between two strings, Parses input from a string according to a format, Replaces some characters in a string (case-insensitive), Repeats a string a specified number of times, Replaces some characters in a string (case-sensitive), Randomly shuffles all characters in a string, Finds the first occurrence of a string inside another string (alias of strstr()), Compares two strings (locale based string comparison), Returns the number of characters found in a string before any part of some specified characters are found, Unquotes a string quoted with addcslashes(), Unquotes a string quoted with addslashes(), Returns the position of the first occurrence of a string inside another string (case-insensitive), Finds the first occurrence of a string inside another string (case-insensitive), Compares two strings using a "natural order" algorithm (case-insensitive), Compares two strings using a "natural order" algorithm (case-sensitive), String comparison of the first n characters (case-insensitive), String comparison of the first n characters (case-sensitive), Searches a string for any of a set of characters, Returns the position of the first occurrence of a string inside another string (case-sensitive), Finds the last occurrence of a string inside another string, Finds the position of the last occurrence of a string inside another string (case-insensitive), Finds the position of the last occurrence of a string inside another string (case-sensitive), Returns the number of characters found in a string that contains only characters from a specified charlist, Finds the first occurrence of a string inside another string (case-sensitive), Translates certain characters in a string, Compares two strings from a specified start position (binary safe and optionally case-sensitive), Counts the number of times a substring occurs in a string, Replaces a part of a string with another string, Removes whitespace or other characters from both sides of a string, Converts the first character of a string to uppercase, Converts the first character of each word in a string to uppercase, Wraps a string to a given number of characters. Note: The strcmp() function is binary safe and case-sensitive. The strcmp() function compares two strings. Examples might be simplified to improve reading and learning. PERCENT Optional. Note: If you only want to determine if a particular needle occurs within haystack, use the faster and less memory intensive function strpos() instead. The first string comes here. It works … In my leisure time, I write technical articles on web development such as PHP, Laravel, CodeIgniter, Mediawiki, Linux, Angular, Ionic, ReactJS, NodeJS, AJAX, jQuery, Cloud and more. It specifies where to break the string. While functions.php file is more convenient, a site-specific plugin is much better. Think of it like a more capable version of the scandir() function. A function will not execute automatically when a page loads. String 2 : It is mandatory. No installation is required to use these functions. Let’s now look at the four different ways of creating strings. Prior to PHP 8.0.0, if needle is not a string, it is converted to an integer and applied as the ordinal value of a character. It splits the string by regular expressions as its paramaters. In PHP, strings can be created with single quotes, double quotes or … Whenever a class is instantiated, a function is triggered. Table of Contents 1. addcslashes()2. convert_uudecode()3. convert_uuencode()4. count_chars()5. echo()6. explode()7. implode()8. md5()9. str_replace()10. str_split()11. To simplify testing I created a simple function which gets 2 arguments: an array of callable functions to compare (as many as you want) with names to display in summary, and a number of loops to test the function. For example, the addition (+) symbol is an operator that tells PHP to add two variables or values, while the greater-than (>) symbol is an operator that tells PHP to compare two values. It counts the number of replacements to be done. A string literal is the notation for representing a string value within the text of a computer program. Simply because it is independent of your WordPress theme and would work regardless of which theme you are using. convert_uudecode — Decode a uuencoded string. The length of a string is often used in loops or other functions, when it is important to know when the string ends. A function will be executed by a call to the function. It specifies the array to join to a string. Replace Last Occurrence of a String. There are thousands of built-in functions in PHP. Some super useful functions that can be performed on strings are: Copyright © 2016-2020 CodephpOnline Ltd. All Rights Reserved, Top 100 PHP Interview Questions and Answers, To Find Occurrence of one string inside other, Positive number – Start at a specified position in the string, Negative number – Start at a specified position from the end of the string, 0 – Start at the first character in string, Positive number – The length to be returned from the start parameter, Negative number – The length to be returned from the end of the string, If the string to be searched is an array, it returns an array, If the string to be searched is an array, find and replace is performed with every array element, If both find and replace are arrays, and replace has fewer elements than find, an empty string will be used as replace, If find is an array and replace is a string, the replace string will be used for every find value. The string which is to be converted to lower case is passed here. A pair of functions to replace every nth occurrence of a string with another string, starting at any position in the haystack. … In PHP, we can define Conditional function, Function within Function and Recursive function also. strlen() The strlen() function returns the length of the string. The str_replace() function replaces some characters with some other characters in a string. In general practice, using the right string function will save you a lot of time as they are pre-defined in PHP libraries and all you have to do is call them to use them. chop — Alias of rtrim. In this tutorial, You will find about 20 handy and most used PHP functions. needle. It can take input as argument list and return value. However it may be hard to tell what a function named glob() does unless you are already familiar with that term from elsewhere.. The strpos() function is used to search for a string or character within a string. 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