array_mergeMerge one or more arrays
&reftitle.description;
arrayarray_mergearrayarray1arrayarray2array...
Merges the elements of one 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.
If only one array is given and the array is numerically indexed, the
keys get reindexed in a continuous way.
&reftitle.parameters;
array1
Initial array to merge.
array
Variable list of arrays to recursively merge.
&reftitle.returnvalues;
Returns the resulting array.
&reftitle.examples;
<function>array_merge</function> example
"red", 2, 4);
$array2 = array("a", "b", "color" => "green", "shape" => "trapezoid", 4);
$result = array_merge($array1, $array2);
print_r($result);
?>
]]>
&example.outputs;
green
[0] => 2
[1] => 4
[2] => a
[3] => b
[shape] => trapezoid
[4] => 4
)
]]>
Simple <function>array_merge</function> example
"data");
$result = array_merge($array1, $array2);
?>
]]>
Don't forget that numeric keys will be renumbered!
data
)
]]>
If you want to completely preserve the arrays and just want to append
them to each other (not overwriting the previous keys), use the
+ operator:
"data");
$result = $array1 + $array2;
?>
]]>
The numeric key will be preserved and thus the association remains.
data
)
]]>
The behavior of array_merge was modified in PHP 5. Unlike PHP 4, array_merge
now only accepts parameters of type array. However, you can use typecasting
to merge other types. See the example below for details.
<function>array_merge</function> PHP 5 example
'bar');
$result = array_merge((array)$beginning, (array)$end);
print_r($result);
?>
]]>
&example.outputs;
foo
[1] => bar
)
]]>
&reftitle.seealso;
array_merge_recursivearray_combinearray operators