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sort
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sort

(PHP 3, PHP 4, PHP 5)

sort -- Sort an array

Description

bool sort ( array &array [, int sort_flags] )

This function sorts an array. Elements will be arranged from lowest to highest when this function has completed.

Note: This function assigns new keys for the elements in array. It will remove any existing keys you may have assigned, rather than just reordering the keys.

Returns TRUE on success or FALSE on failure.

Example 1. sort() example

<?php

$fruits = array("lemon", "orange", "banana", "apple");
sort($fruits);
reset($fruits);
while (list($key, $val) = each($fruits)) {
    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.

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 4.3.12 and 5.0.2.

Note: The second parameter was added in PHP 4.

Warning

Be careful when sorting arrays with mixed types values because sort() can produce unpredictable results.

See also arsort(), asort(), ksort(), natsort(), natcasesort(), rsort(), usort(), array_multisort(), and uksort().

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