Compare the key names and key values of two arrays and return the intersection:
<?php$a1=array("a"=>"red","b"=>"green","c"=>"blue","d"=>"yellow");$a2=array( "a"=>"red ","b"=>"green","c"=>"blue");$result=array_intersect_assoc($a1,$a2);print_r($result);?>The array_intersect_assoc() function is used to compare the key names and key values of two (or more) arrays and return the intersection.
This function compares the keys and values of two (or more) arrays and returns an intersection array that includes everything in the compared array ( array1 ), as well as any other argument arrays ( array2 or array3 etc.) in the key name and key value.
array_intersect_assoc( array1,array2,array3... )
| parameter | describe |
|---|---|
| array1 | Required. The first array to compare with other arrays. |
| array2 | Required. The array to compare to the first array. |
| array3,... | Optional. Additional array to compare with the first array. |
| Return value: | Returns an intersection array containing all keys and values in the compared array ( array1 ) and any other parameter arrays ( array2 or array3 , etc.). |
|---|---|
| PHP version: | 4.3.0+ |
Compare the key names and key values of three arrays and return the intersection:
<?php$a1=array("a"=>"red","b"=>"green","c"=>"blue","d"=>"yellow");$a2=array( "a"=>"red","b"=>"green","g"=>"blue" );$a3=array("a"=>"red","b"=>"green","g"=>"blue");$result=array_intersect_assoc($a1,$a2,$a3); print_r($result);?>