PHP String Programs Last Updated : 23 Jul, 2025 Comments Improve Suggest changes 1 Likes Like Report Strings can be seen as a stream of characters. For example, ‘G’ is a character, and ‘GeeksforGeeks’ is a string. This article contains a list of all programming articles based on String in PHP that are majorly asked in Interviews. S. No. Articles 1PHP Program to Read Each Character of a String 2PHP Program to Check for Substring in a String3PHP Program to Replace String4PHP Program to Get the Last Character of a String 5PHP Program to Get the Position of a Character in a String 6PHP Program to Insert a Line Break in a String7PHP Program to Check if a String Contains a Substring8PHP Program to Get the Last n Characters of a String9PHP Program to Check a String is a Rotation of Another String10PHP Program to Limit String Length11PHP Program to Replace a Word Inside a String12PHP Program to Check for Empty String13PHP Program to Prepend a String14PHP Program to Get a Substring Between Two Strings15PHP Program to Write Multi-Line Strings16PHP Program to Get the First Word of a Sentence17PHP Program to Convert Array to String18PHP Program to Extract Numbers From a String19PHP Program to Get Different Characters in the Given String20PHP Program to Find Number of Characters in a String 21PHP Program to Insert String at Specified Position22PHP Program to Encrypt and Decrypt a String23PHP Program to Concatenation of Two Strings24PHP Program to Put String in Array and Split by New Line 25PHP Program to Change Strings in an Array to Uppercase26PHP Program to Remove Special Character from String 27PHP Program to Remove All Non-Printable Characters in a String 28PHP Program to Generating Random String 29PHP Program to Print All Permutations of a Given String30PHP Program to Repeat a String to a Specific Number of Times 31PHP Program to Replace Multiple Characters in a String 32PHP Program to Remove the First Character of a String 33PHP Program to Find the Length of the Last Word in a String34PHP Program to Generate a Random, Unique, Alphanumeric String35PHP Program to Get String Length 36PHP Program to Find Minimum Rotations that Required to Get the Same String37PHP Program to Remove Line Breaks from the String 38PHP Program to Convert a String into Number 39PHP Program to Extract Numbers from String 40PHP Program to Convert Uppercase String to Lowercase 41PHP Program to Convert an Integer Into a String42PHP Program to String Comparison using == vs strcmp() Function 43PHP Program to Sort Array of Strings in Natural and Standard Orders44PHP Program to Print All the Values of an Array 45PHP Program to Create Comma Separated List from an Array 46PHP Program to Check for Empty String 47PHP Program to Append a String 48PHP Program to Remove All White Spaces from a String 49PHP Program to Converting String to Date and DateTime50PHP Program to Count the Number of Words in a String51PHP Program to Convert String to Boolean 52PHP Program to Get a Variable Name as a String 53PHP Program to Convert DateTime to String 54PHP Program to Remove New Lines from String 55PHP Program to Get String Between Two Characters 56PHP Program to Remove White Spaces from Beginning/End of a String57PHP Program to Check if All Characters are Lowercase58PHP Program to Removing Occurrences of a Specific Character from End of a String59PHP Program to Convert Lowercase String to Uppercase 60PHP Program to Convert First Character of All Words Uppercase61PHP Program to Find the Number of Sub-string Occurrences62PHP Program to Create a String by Joining the Array Elements Comment H hardiksm73 Follow 1 Improve H hardiksm73 Follow 1 Improve Article Tags : PHP PHP-string Explore PHP Tutorial 8 min read BasicsPHP Syntax 4 min read PHP Variables 5 min read PHP | Functions 8 min read PHP Loops 4 min read ArrayPHP Arrays 5 min read PHP Associative Arrays 4 min read Multidimensional arrays in PHP 5 min read Sorting Arrays in PHP 4 min read OOPs & InterfacesPHP Classes 2 min read PHP | Constructors and Destructors 5 min read PHP Access Modifiers 4 min read Multiple Inheritance in PHP 4 min read MySQL DatabasePHP | MySQL Database Introduction 4 min read PHP Database connection 2 min read PHP | MySQL ( Creating Database ) 3 min read PHP | MySQL ( Creating Table ) 3 min read PHP AdvancePHP Superglobals 6 min read PHP | Regular Expressions 12 min read PHP Form Handling 4 min read PHP File Handling 4 min read PHP | Uploading File 3 min read PHP Cookies 9 min read PHP | Sessions 7 min read Like