Explain the difference between $message and $$message.

The main difference between the $message and $$message is given below: $message $$message $message is a regular variable. $$message is a reference variable. It has a fixed name and stores a fixed value. It stores data about the variable. Data stored in $message is fixed. The value of the $$message can change dynamically as the … Read more

Differentiate between variables and constants in PHP

Few difference between variables and constants in PHP are given below Variables Constants The value of a variable can be changed during the execution. The constant value can’t be changed during script execution. Variables require compulsory usage of the $ sign at the start. No dollar sign ($) is required before using a constant. It … Read more

Find Factorial of a number in PHP

Find Factorial of a Number using While Loop Find Factorial of a Number using Recursion in PHP

What is difference between array_merge and array_combine?

array_combine() is used to creates a new array by using the key of one array as keys and using the value of another array as values. Whereas array_merge() merges one or more than one array such that the value of second array appended at the end of the first array.

How to check a key exist in an array

PHP array_key_exists() Function is used to check a key exist or not in an array.

Write a Program to swap two numbers in PHP

Functions available to sort an array in PHP

PHP functions for Sorting Arrays are

Find Missing number in an array

PHP Array Functions

PHP provides various array functions to access and manipulate the elements of array. The important PHP array functions are given below.   Function Description array() Creates an array array_change_key_case() Changes all keys in an array to lowercase or uppercase array_chunk() Splits an array into chunks of arrays array_column() Returns the values from a single column … Read more