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function.sort

Source of: /manual/en/function.sort.php


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sort

(PHP 4, PHP 5)
sortSort an array

Description

bool sort
( array &$array
[, int $sort_flags = SORT_REGULAR
] )

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 locale, which can be changed using setlocale().



  • SORT_NATURAL - compare items as strings
    using "natural ordering" like natsort(). Added in
    PHP 5.4.0.


  • SORT_FLAG_CASE - can be combined
    (bitwise OR) with
    SORT_STRING or
    SORT_NATURAL to sort strings case-insensitively. Added in PHP 5.4.0.





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.
Example #2 sort() example using case-insensitive natural
ordering


<?php

$fruits 
= array(
    
"Orange1""orange2""Orange3""orange20");sort($fruitsSORT_NATURAL SORT_FLAG_CASE);
foreach (
$fruits as $key => $val) {
    echo 
"fruits[" $key "] = " $val "\n";
}
?>


The above example will output:
fruits[0] = Orange1
fruits[1] = orange2
fruits[2] = Orange3
fruits[3] = orange20
The fruits have been sorted like natcasesort().

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.

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

See Also

Sumber :http://www.php.net
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