array_key_exists function in php
0 1970
array_key_exists function in PHP used find whether a particular key or index is exist in array or not.
- It is an inbuilt function of PHP with two parameters.
- Return type of array_key_exists function is Boolean means it can return either TRUE or FALSE.
- If the given key is present in the array , then array_key_exists function returns TRUE Otherwise it returns FALSE.
Syntax:
array_key_exists(arr_key, arr);
Here
arr is the array in which we search the existence of a particular key and arr_key parameter represent that key which we want to search.
Example 1:
<?php $arr=array("Ram"=>"1231","Shyam"=>"1232","Deepak"=>"1233","Divya"=>"1234","Radha"=>"1235"); // employees name with ID $key="Radha"; if(array_key_exists($key,$arr)){ echo "The employee ID of ".$key." is ".$arr[$key]; }else{ echo $key." is not exist"; } ?>
Output:
Example 2:
<?php $arr=array("Ram","Shyam","Deepak","Divya","Radha"); // employees name if(array_key_exists(3,$arr)){ echo "The employee ".$arr[3]." is exist"; }else{ echo "not exist"; } ?>
Output:
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