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PHP asort() Function
PHP asort() Function
PHP asort() function is used to sort any given input array according to its values. It sorts the given array in a way that the relation between indexes and values is maintained. By default it sorts the array values in ascending order.It accepts two parameters $array and $sort type. It returns a Boolean value True on success and False on failure as result.
Syntax:
asort($array, $sorttype);
Parameter Values
| Parameter | Description |
|---|---|
| array | This is a required parameter. This parameter defines the array to sort. |
| sorttype | This is an optional parameter. This parameter defines how to compare the array elements. |
Here is an example of asort() function in PHP:
<html>
<body>
<pre>
<?php
for($i=10;$i>=0;$i--)
{
$x[]=$i;
}
asort($x);
print_r($x);
?>
</pre>
</body>
</html>
Output:
Array
(
[10] => 0
[9] => 1
[8] => 2
[7] => 3
[6] => 4
[5] => 5
[4] => 6
[3] => 7
[2] => 8
[1] => 9
[0] => 10
)
Example 2:
<html>
<body>
<pre>
<?php
for($i=10;$i>=0;$i--)
{
$x[]=$i;
}
asort($x);
echo "Sorted using the asort(): <br>";
print_r($x);
arsort($x);
echo "Sorted using the arsort(): <br>";
print_r($x);
?>
</pre>
</body>
</html>
Output:
Sorted using the asort():
Array
(
[10] => 0
[9] => 1
[8] => 2
[7] => 3
[6] => 4
[5] => 5
[4] => 6
[3] => 7
[2] => 8
[1] => 9
[0] => 10
)
Sorted using the arsort():
Array
(
[0] => 10
[1] => 9
[2] => 8
[3] => 7
[4] => 6
[5] => 5
[6] => 4
[7] => 3
[8] => 2
[9] => 1
[10] => 0
)
Example 3:
<html>
<body>
<pre>
<?php
for($i=0;$i<=15;$i++)
{
$x[]=$i;
}
asort($x,1);
echo "When sorted as a Numeric Value: <br>";
print_r($x);
asort($x,2);
echo "When sorted as a String Value: <br>";
print_r($x);
?>
</pre>
</body>
</html>
Output:
When sorted as a Numeric Value:
Array
(
[0] => 0
[1] => 1
[2] => 2
[3] => 3
[4] => 4
[5] => 5
[6] => 6
[7] => 7
[8] => 8
[9] => 9
[10] => 10
[11] => 11
[12] => 12
[13] => 13
[14] => 14
[15] => 15
)
When sorted as a String Value:
Array
(
[0] => 0
[1] => 1
[10] => 10
[11] => 11
[12] => 12
[13] => 13
[14] => 14
[15] => 15
[2] => 2
[3] => 3
[4] => 4
[5] => 5
[6] => 6
[7] => 7
[8] => 8
[9] => 9
)
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