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PHP StringHow to Check if a String Contains a Substring in PHPThis article introduces how to check if a string contains a substring in PHP. PHP ArrayHow to Add Elements to an Array in PHPThis article introduces how to add elements to an array in PHP. It includes the array_push() function and the Direct Assignment Method. PHP StringHow to Write Multi-Line Strings in PHPThis article introduces how to write multi-line strings in PHP. It includes an escape sequence and concatenation assignment operator. PHP ArrayHow to Reset Array in PHPThis article introduces how to reset an array in PHP. It includes unset() function and array_diff() function. PHP ArrayHow to Perform Array Delete by Value Not Key in PHPThis article introduces how to perform array delete by value not key in PHP. It includes array_search() function, unset() function and array_diff() function. PHP StringHow to Concatenate Strings in PHPThis article introduces how to d string concatenation in PHP. It includes the concatenation operator, concatenation assignment operator, and the sprintf() function. PHP ArrayHow to Initialize Empty Array in PHPThis article introduces how to initialize an empty array in PHP. It includes square brackets and array() function. PHP RegexHow to Format Phone Numbers in PHPThis article introduces how to format phone numbers in PHP. It includes preg_match() function and sprintf() function. PHP StringHow to Convert String to Float in PHPThis article introduces how to convert string to float in PHP. It includes type casting, floatval() function, and number_format() function. PHP ArrayHow to Remove Duplicate Values From an Array in PHPThis article introduces how to remove duplicate values from an array in PHP. It includes array_unique() function. PHP XMLHow to Convert XML to JSON in PHPThis article introduces how to convert xml to json in PHP. It includes simplexml_load_string() function and json_encode() function. PHP RoutingHow to Redirect in PHPThis tutorial demonstrates how to redirect a user from a page to a different page in PHP PHP StringHow to Generate Random String in PHPThis tutorial demonstrates randomly generation of string in PHP PHP CharacterHow to Remove Special Character in PHPThis tutorial shows the removal of special character from string in PHP PHPHow to Read if Checkbox Is Checked in PHPThis tutorial demonstrates how to read if a checkbox is checked in PHP PHPHow to Get User IP Address in PHPThis tutorial demonstrates how to get the user's IP address in PHP PHP ErrorHow to Show All Errors in PHPThis tutorial demonstrates how to display errors and warnings in PHP PHP MySQLHow to Count Rows in MySQL PHPThis tutorial demonstrates how to count the total number of rows of mysql table in PHP PHP EchoHow to Add Line Break in PHPThis tutorial demonstrates how to add a line beak within echo in PHP PHP FileHow to Write Array to a File in PHPThis tutorial demonstrates how to write arrays to a file in PHP PHP POSTHow to Send POST Request in PHPThis tutorial demonstrates how to send POST Request with PHP PHPHow to Refresh a Page in PHPThis tutorial demonstrates how to refresh a page periodically in PHP PHP SQLHow to Prevent SQL Injection in PHPThis tutorial demonstrates how to prevent SQL injection in PHP PHP SwitchHow to Use Default in PHP Switch CaseThis tutorial introduces the working mechanism of default in switch case in PHP