Description
array
array_merge ( array array1,
array array2 [, array ...])
array_merge() merges the
elements of two or more arrays together so that the values of
one are appended to the end of the previous one. It returns
the resulting array.
If the input arrays have the same string keys, then the
later value for that key will overwrite the previous one. If,
however, the arrays contain numeric keys, the later value
will not
overwrite the original value, but will be appended.
範例 1. array_merge()
example
$array1 = array ("color" = "red", 2, 4);
$array2 = array ("a", "b", "color" = "green", "shape" = "trapezoid", 4);
$result = array_merge ($array1, $array2);
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The $result will
be:
Array
(
[color] = green
[0] = 2
[1] = 4
[2] = a
[3] = b
[shape] = trapezoid
[4] = 4
)
|
|
範例 2. Simple
array_merge() example
$array1 = array();
$array2 = array(1 = "data");
$result = array_merge($array1, $array2);
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Don't forget that numeric keys will be
renumbered!
If you want to completely preserve the arrays
and just want to append them to each other, use the
+ operator:
$array1 = array();
$array2 = array(1 = "data");
$result = $array1 + $array2;
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The numeric key will be preserved and thus the
association remains.
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注: Shared keys will be overwritten on a
first-come first-served basis.
See also
array_merge_recursive().