sort
(PHP 4, PHP 5)
sort — Sort an array
Description
This function sorts an array. Elements will be arranged from lowest to highest when this function has completed.
Parameters
- array
-
The input array.
- sort_flags
-
The optional second parameter sort_flags may be used to modify the sorting behavior using these values:
Sorting type flags:
- SORT_REGULAR - compare items normally (don't change types)
- SORT_NUMERIC - compare items numerically
- SORT_STRING - compare items as strings
- SORT_LOCALE_STRING - compare items as strings, based on the current locale. Added in PHP 4.4.0 and 5.0.2, it uses the system locale, which can be changed using setlocale().
Return Values
Returns TRUE on success or FALSE on failure.
Examples
Example #1 sort() example
<?php
$fruits = array("lemon", "orange", "banana", "apple");
sort($fruits);
foreach ($fruits as $key => $val) {
echo "fruits[" . $key . "] = " . $val . "\n";
}
?>
The above example will output:
fruits[0] = apple fruits[1] = banana fruits[2] = lemon fruits[3] = orange
The fruits have been sorted in alphabetical order.
Notes
Note: This function assigns new keys to the elements in array. It will remove any existing keys that may have been assigned, rather than just reordering the keys.
Note: Like most PHP sorting functions, sort() uses an implementation of » Quicksort.
Be careful when sorting arrays with mixed types values because sort() can produce unpredictable results.
See Also
- asort() - Sort an array and maintain index association
- The comparison of array sorting functions