PHP Array Functions

PHP Provides wide range of functions to perform operations on array.

is Array Function Example

During Runtime if you want to check with a variable is a variable or an array then php is_array() function help out from this trouble.

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	<?php
	//Getting the Length of an Array
	$fruit[]="Apple";
	$fruit[]="Orange";
	$fruit[]="Mango";
	echo is_array($fruit)?"It's an array":"it's a variable";
	?>

Array Length Function Example

In Programming tasks many time we require to know the length of an unknown array.

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	<?php
	//Getting the Length of an Array
	$fruit[]="Apple";
	$fruit[]="Orange";
	$fruit[]="Mango";
	echo count($fruit);
	?>

Print an Array Example

PHP provide print_r() function to print whole array with single line.

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	<?php
	$colors=array("white","green","black");
	print_r($colors);
	?>

Array Sort Function Example

Sorting is very important task during retrieval/display the data from database. PHP Provides different sort functions, but currently we will discuss sort() & rsort() functions.

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	<?php
	$colors=array("white","green","black");
	sort($colors); //Sort an array in ascending order
	print_r($colors);
	
	$rcolors=array("black","white","green");
	rsort($rcolors); //Sort an array in reverse order
	print_r($rcolors);
	
	
	?>

Array Shuffle Function Example

There are many times when you need to put an array an random order. so don’t worry PHP Have shuffle() function to perform this operation.

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	<?php
	
	//Shuffle
	$colors=array("red","green","yellow","blue");
	shuffle($colors);
	print_r($colors); // every time you will see the different color at different index
	
	?>

Array Reset Function Example

Reset() function moves the array index pointer to the first index of an array.

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	<?php
	//Reset
	$colors=array("red","green","yellow","blue");
	echo reset($colors);
	?>

Array End Function Example

End() function moves the array index pointer to the last index of an array.

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	<?php
	$colors=array("red","green","yellow","blue");
	echo end($colors); //Move the array Index Pointer to Last Index of an array and return the value of last index
	?>

Explode Function Example

Some time we have long string with same pattern and want to divide this long string into array. explode() function will convert a string to an array.

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	<?php
	//Explode
	$URL="phpdocs.com/php/variables";
	$URL_array=explode('/',$URL); //divide the string into different parts on the base of forward slash (/)
	print_r($URL_array);
	}
	?>