The elements in an array can be sorted in alphabetical or numerical order, descending or ascending.
PHP – Sort Functions For Arrays
sort() – sort arrays in ascending order
rsort() – sort arrays in descending order
asort() – sort associative arrays in ascending order, according to the value
ksort() – sort associative arrays in ascending order, according to the key
arsort() – sort associative arrays in descending order, according to the value
krsort() – sort associative arrays in descending order, according to the key
Sort Array in Ascending Order – sort()
The following example sorts the elements of the $cars array in ascending alphabetical order:
Example
<!DOCTYPE html>
<html>
<body>
<?php
$cars = array(“Volvo”, “BMW”, “Toyota”);
sort($cars);
$clength = count($cars);
for($x = 0; $x < $clength; $x++) {
echo $cars[$x];
echo “<br>”;
}
?>
</body>
</html>
Output
The following example sorts the elements of the $numbers array in ascending numerical order:
Example
<!DOCTYPE html>
<html>
<body>
<?php
$numbers = array(4, 6, 2, 22, 11);
sort($numbers);
$arrlength = count($numbers);
for($x = 0; $x < $arrlength; $x++) {
echo $numbers[$x];
echo “<br>”;
}
?>
</body>
</html>
Output
Sort Array in Descending Order – rsort()
The following example sorts the elements of the $cars array in descending alphabetical order:
Example
<!DOCTYPE html>
<html>
<body>
<?php
$cars = array(“Volvo”, “BMW”, “Toyota”);
rsort($cars);
$clength = count($cars);
for($x = 0; $x < $clength; $x++) {
echo $cars[$x];
echo “<br>”;
}
?>
</body>
</html>
Output
The following example sorts the elements of the $numbers array in descending numerical order:
Example
<!DOCTYPE html>
<html>
<body>
<?php
$numbers = array(4, 6, 2, 22, 11);
rsort($numbers);
$arrlength = count($numbers);
for($x = 0; $x < $arrlength; $x++) {
echo $numbers[$x];
echo “<br>”;
}
?>
</body>
</html>
Output
Sort Array (Ascending Order), According to Value – asort()
The following example sorts an associative array in ascending order, according to the value:
Example
<!DOCTYPE html>
<html>
<body>
<?php
$age = array(“Peter”=>”35”, “Ben”=>”37”, “Joe”=>”43”);
asort($age);
foreach($age as $x => $x_value) {
echo “Key=” . $x . “, Value=” . $x_value;
echo “<br>”;
}
?>
</body>
</html>
Output
Sort Array (Ascending Order), According to Key – ksort()
The following example sorts an associative array in ascending order, according to the key:
Example
<!DOCTYPE html>
<html>
<body>
<?php
$age = array(“Peter”=>”35”, “Ben”=>”37”, “Joe”=>”43”);
ksort($age);
foreach($age as $x => $x_value) {
echo “Key=” . $x . “, Value=” . $x_value;
echo “<br>”;
}
?>
</body>
</html>
 Output
Sort Array (Descending Order), According to Value – arsort()
The following example sorts an associative array in descending order, according to the value:
Example
<!DOCTYPE html>
<html>
<body>
<?php
$age = array(“Peter”=>”35”, “Ben”=>”37”, “Joe”=>”43”);
arsort($age);
foreach($age as $x => $x_value) {
echo “Key=” . $x . “, Value=” . $x_value;
echo “<br>”;
}
?>
</body>
</html>
Output
Sort Array (Descending Order), According to Key – krsort()
The following example sorts an associative array in descending order, according to the key:
Example
<!DOCTYPE html>
<html>
<body>
<?php
$age = array(“Peter”=>”35”, “Ben”=>”37”, “Joe”=>”43”);
krsort($age);
foreach($age as $x => $x_value) {
echo “Key=” . $x . “, Value=” . $x_value;
echo “<br>”;
}
?>
</body>
</html>
Output
Robert Karamagi 