get key of value array php

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Leonardo
23 Jan 2019
1
2<?php
3$array array(0 => 'blue'1 => 'red'2 => 'green'3 => 'red');
4
5$key = array_search('green'$array); // $key = 2;
6$key = array_search('red'$array);   // $key = 1;
7?>
8
9
Fernando
26 Mar 2020
1$people = array(
2  2 => array(
3    'name' => 'John',
4    'fav_color' => 'green'
5  ),
6  5=> array(
7    'name' => 'Samuel',
8    'fav_color' => 'blue'
9  ));
10$found_key = array_search('blue', array_column($people, 'fav_color'));
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