PHP | key() Function
October 30, 2020
Hello dear readers! welcome back to another section of our tutorial on PHP. In this tutorial guide, we are going to be studying about the PHP key() Function.
The PHP key() function returns the element key from the current internal pointer position.
The PHP key() function returns the element key from the current internal pointer position.
Syntax
Following below is the syntax to use this function -
key ( $array );
READ: PHP in_array() Function
Parameter Details
Sr.No | Parameter & Description |
---|---|
1 | array(Required) It specifies an array |
Return Value
This built-in function returns key on success, otherwise False on error.
Example
Try out the below example -
<?php $fruit = array( 'f1' => 'apple', 'f2' => 'orange', 'f3' => 'grape', 'f4' => 'apple', 'f5' => 'apple'); while ($f_name = current($fruit)) { if ($f_name == 'apple') { echo key($fruit)."\n"; } next($fruit); } ?>
Output
When the above code is executed, it will produce the following result -
f1 f4 f5
READ: PHP extract() Function
Alright guys! This is where we are rounding up for this tutorial post. In our next tutorial guide, we are going to be discussing about the PHP krsort() Function.
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Feel free to ask your questions where necessary and i will attend to them as soon as possible. If this tutorial was helpful to you, you can use the share button to share this tutorial.
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Thanks for reading and bye for now.