PHP key() Function

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# PHP key() Function

Complete PHP Array Reference

## Definition and Usage

The key() function returns the element key from the current internal pointer position.

This function returns FALSE on error.

## Syntax

    key(array)

Parameter | Description
--- | ---
array | Required. Specifies the array to use

## Example

    <?php
    $people = array("Peter", "Joe", "Glenn", "Cleveland");
    echo "The key from the current position is: " . key($people);
    ?>

The output of the code above will be:

    The key from the current position is: 0

Complete PHP Array Reference

From http://www.w3schools.com (Copyright Refsnes Data)