PHP Sorting Arrays

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Sort Functions For Arrays In this chapter, we will go through the following PHP array sort functions:

PHP 1 Sort Array in Ascending Order - sort()

The following example sorts the elements of the $cars array in ascending alphabetical order:

<h4>Sort_Array_in_Ascending_Order</h4>
<p>The following example sorts the elements of the $cars array in ascending alphabetical order:</p>
<?php
$cars = array("Volvo", "BMW", "Toyota");
sort($cars);

$clength = count($cars);
for($x = 0; $x < $clength; $x++) {
  echo $cars[$x];
  echo "<br>";
}
?>
<hr>
<p>The following example sorts the elements of the $numbers array in ascending numerical order:</p>

<?php
$numbers = array(4, 6, 2, 22, 11);
sort($numbers);

$arrlength = count($numbers);
for($x = 0; $x < $arrlength; $x++) {
  echo $numbers[$x];
  echo "<br>";
}
?>

Example 1

Result View Example

PHP 2 Sort Array in Descending Order - rsort()

The following example sorts the elements of the $cars array in descending alphabetical order:

<h4>Sort_Array_in_Descending_Order</h4>
        <p></p>
        <?php
        $cars = array("Volvo", "BMW", "Toyota");
        rsort($cars);

        $clength = count($cars);
        for($x = 0; $x < $clength; $x++) {
        echo $cars[$x];
        echo "<br>";
        }
        ?>
        <hr>
        <p>The following example sorts the elements of the $numbers array in descending numerical order:</p>
        <?php
        $numbers = array(4, 6, 2, 22, 11);
        rsort($numbers);

        $arrlength = count($numbers);
        for($x = 0; $x < $arrlength; $x++) {
        echo $numbers[$x];
        echo "<br>";
        }
        ?>

Example 2

Result View Example

PHP 3 Sort Array (Ascending Order), According to Value - asort()

The following example sorts an associative array in ascending order, according to the value:

<h4>According_to_Value_Ascending</h4>
<?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>";
}
?>

Example 3

Result View Example

PHP 4 According to Key Ascending

The following example sorts an associative array in ascending order, according to the key:

<h4>According_to_Key_Ascending</h4>
<?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>";
}
?>

Example 4

Result View Example

PHP 5 According to Value Descending

The following example sorts an associative array in descending order, according to the value:

<h4>According_to_Value_Descending</h4>
<?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>";
    }
?>

Example 5

Result View Example

PHP 6 According to Key Descending

The following example sorts an associative array in descending order, according to the key:

<h4>According_to_Key_Descending</h4>
<?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>";
    }
?>

Example 6

Result View Example

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