Online PHP editor | refs for 9J5XH

@ 2016-08-23T14:52:48Z

<?php

$originalArray = [
    [
        'entity_id' => '131813'
    ],
    [
        'entity_id' => '213808'
    ],
    [
        'entity_id' => '712885'
    ]
];

$newArray = [];
foreach($originalArray AS $entity) {
    $newArray[] = $entity['entity_id'];
}

print_r($newArray);