PHP array_replace() Function
Definition
The array_replace() function replaces the values of the first array with the values from following arrays.
Syntax
PHP array_replace() Function has the following syntax.
array_replace(array1,array2,array3...)Parameter
| Parameter | Is Required | Description |
|---|---|---|
| array1 | Required. | Array to replace |
| array2 | Optional. | Array to replace array1 |
| array3,... | Optional. | Array to replace array1 and array2, etc. |
Example 1
Replaces the values of the first array with the values from following arrays
<?php// w w w . jav a 2 s. c o m
$a1=array("A","C");
$a2=array("B","D");
print_r(array_replace($a1,$a2));
?>
The code above generates the following result.
Example 2
If a key from array1 exists in array2, and if the key only exists in array1:
<?php//from w w w . j a v a 2 s.co m
$a1=array("p"=>"PHP","j"=>"Java");
$a2=array("p"=>"Python");
print_r(array_replace($a1,$a2));
?>
The code above generates the following result.
Example 3
If a key exists in array2 and not in array1:
<?php/* www .j a v a 2 s.c o m*/
$a1=array("a"=>"red","java2s.com");
$a2=array("c"=>"orange","d"=>"burgundy");
print_r(array_replace($a1,$a2));
?>
The code above generates the following result.
Example 4
Using three arrays - the last array ($a3) will overwrite the previous ones ($a1 and $a2):
<?php/*from w w w . java 2s . c o m*/
$a1=array("A","B");
$a2=array("A","java2s.com");
$a3=array("B","F");
print_r(array_replace($a1,$a2,$a3));
?>
The code above generates the following result.
Example 5
Using numeric keys - If a key exists in array2 and not in array1:
<?php//from ww w . j a v a 2s . c o m
$a1=array("A","B","C","D");
$a2=array(0=>"java2s.com",30=>"PHP");
print_r(array_replace($a1,$a2));
?>
The code above generates the following result.
