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 PHP manuál : function.array-pad.html

array_pad
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array_pad

(PHP 4, PHP 5)

array_pad --  Pad array to the specified length with a value

Description

array array_pad ( array input, int pad_size, mixed pad_value )

array_pad() returns a copy of the input padded to size specified by pad_size with value pad_value. If pad_size is positive then the array is padded on the right, if it's negative then on the left. If the absolute value of pad_size is less than or equal to the length of the input then no padding takes place. It is possible to add most 1048576 elements at a time.

Example 1. array_pad() example

<?php
$input = array(12, 10, 9);

$result = array_pad($input, 5, 0);
// result is array(12, 10, 9, 0, 0)

$result = array_pad($input, -7, -1);
// result is array(-1, -1, -1, -1, 12, 10, 9)

$result = array_pad($input, 2, "noop");
// not padded
?>

See also array_fill() and range().

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