How to convert array values to lowercase in PHP ?
Last Updated :
24 Jun, 2021
Given an array containing uppercase string elements and the task is to convert the array elements (uppercase) into lowercase. There are two ways to convert array values to lowercase in PHP.
Using foreach loop: In this approach, an iterator iterates through the value of an array individually and convert each array elements into lowercase and stores the converted values to the original array.
Program:
PHP
<?php
$arr = array ( 'GFG' , 'GEEK' ,
'GEEKS' , 'GEEKSFORGEEKS' );
$j = 0;
foreach ( $arr as $element ) {
$arr [ $j ] = strtolower ( $element );
$j ++;
}
foreach ( $arr as $element )
echo $element . "\n" ;
?>
|
Output:
gfg
geek
geeks
geeksforgeeks
Using array_map() function: In this approach, the array_map() function is used to accept two parameters callback and an array.
Syntax:
array array_map( callable callback, array array )
Here callback is a function to be called for operation on an array. This function can be an inbuilt function or an user-defined function whereas array is list of values on which operation to be performed.
Program 2:
PHP
<?php
$arr = array ( 'GFG' , 'GEEK' ,
'GEEKS' , 'GEEKSFORGEEKS' );
$arr = array_map ( 'strtolower' , $arr );
foreach ( $arr as $element )
echo $element . "\n" ;
?>
|
Output:
gfg
geek
geeks
geeksforgeeks
Share your thoughts in the comments
Please Login to comment...