PHP Array Functions
There are various array functions in PHP. They are used to access and manipulate the elements ofan array.
Following are functions of array.
| Array Function | Description |
| array() | It is used to create an array. |
| array_change_key_case() | It is used to convert lowercase or uppercase of all keys in an array. |
| array_chunk() | It is used to split an array into chunks of arrays. |
| array_pop() | It is used to delete the last element of an array. |
| array_merge() | It is used to merge one or more arrays into one array. |
| array_rand() | It is used to returns one or more random keys from an array. |
| array_reverse() | It returns an array in the reverse order. |
| array_search() | It searches an array for a given value and returns the key. |
| count() | It returns the number of elements in an array. |
| extract() | It imports variables into the current symbol table from an array. |
| sort() | PHP sort() function sorts all the elements in an array. |
- PHP array() function
<!DOCTYPE html>
<html>
<body>
<?php
$week=array("Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday");
$arrlength=count($week);
echo "=====To print Week days using an array======"."<br>";
for($x=0;$x<$arrlength;$x++)
{
echo $week[$x];
echo "<br>";
}
?>
</body>
</html>
Output
=====To print Week days using an array======
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
- array_change_key_case() function
<!DOCTYPE html>
<html>
<body>
<?php
$salary=array("Sunday"=>"1","Monday"=>"2","Tuesday"=>"3");
print_r(array_change_key_case($salary,CASE_UPPER));
?>
</body>
</html>
Output
Array ( [SUNDAY] => 1 [MONDAY] => 2 [TUESDAY] => 3 )3). PHP array_chunk() function PHP array_chunk() function is used to split an array into chunks. We can divide array into many parts. Example
<!DOCTYPE html>
<html>
<body>
<?php
$salary=array("Sunday"=>"1","Monday"=>"2","Tuesday"=>"3");
print_r(array_chunk($salary,2));
?>
</body>
</html>
Output
Array ( [0] => Array ( [0] => 1 [1] => 2 ) [1] => Array ( [0] => 3 ) )PHP array_pop() Function PHP array_pop() function is used to delete last element of an array. Example
<?php
$a=array("red","green","blue");
array_pop($a);
print_r($a);
?>
PHP count() Function
PHP count() function is used to return the number of elements in an array.
Example
<!DOCTYPE html>
<html>
<body>
<?php
$color=array("Red","Blue","Green","Magenta");
echo count($color);
?>
</body>
</html>
Output
4
PHP sort() Function
PHP short() function is used to sort the elements of an array in ascending order.
Example
<!DOCTYPE html>
<html>
<body>
<?php
$color=array(27,21,83,11);
sort($color);
$clength=count($color);
echo"Assending Order [27,21,83,11]"."<br>";
for($x=0;$x<$clength;$x++){
echo $color[$x];
echo "<br>";
}
?>
</body>
</html>
Output
Assending Order [27,21,83,11]
11
21
27
83