get array key php

<?php
$array = array(
    'fruit1' => 'apple',
    'fruit2' => 'orange',
    'fruit3' => 'grape',
    'fruit4' => 'apple',
    'fruit5' => 'apple');

$keys = array_keys($array);		// return array
$values = array_values($array);	// return array
?>

4
6

                                    
&lt;?php
$array&nbsp;=&nbsp;array(
&nbsp;&nbsp;&nbsp;&nbsp;'fruit1'&nbsp;=&gt;&nbsp;'apple',
&nbsp;&nbsp;&nbsp;&nbsp;'fruit2'&nbsp;=&gt;&nbsp;'orange',
&nbsp;&nbsp;&nbsp;&nbsp;'fruit3'&nbsp;=&gt;&nbsp;'grape',
&nbsp;&nbsp;&nbsp;&nbsp;'fruit4'&nbsp;=&gt;&nbsp;'apple',
&nbsp;&nbsp;&nbsp;&nbsp;'fruit5'&nbsp;=&gt;&nbsp;'apple');

//&nbsp;this&nbsp;cycle&nbsp;echoes&nbsp;all&nbsp;associative&nbsp;array
//&nbsp;key&nbsp;where&nbsp;value&nbsp;equals&nbsp;&quot;apple&quot;
for($i = 0; $i&lt; sizeof($array);$i++){
if&nbsp;(key($array[$i])&nbsp;==&nbsp;'apple')&nbsp;{
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;key($array).'&lt;br&nbsp;/&gt;';
&nbsp;&nbsp;&nbsp;&nbsp;}
&nbsp;&nbsp;&nbsp;&nbsp;//next($array);
}
?&gt;

4 (6 Votes)
0
0
0
RedDave 70 points

                                    array_keys ($array);
// It returns an array
// more informations at https://www.php.net/manual/fr/function.array-keys.php (fr)

0
0
0
10
Hose 80 points

                                    $people = array(
  2 =&gt; array(
    'name' =&gt; 'John',
    'fav_color' =&gt; 'green'
  ),
  5=&gt; array(
    'name' =&gt; 'Samuel',
    'fav_color' =&gt; 'blue'
  ));
$found_key = array_search('blue', array_column($people, 'fav_color'));

0
0
0
0
Ephemer 105 points

                                    
&lt;?php
$array&nbsp;=&nbsp;array(
&nbsp;&nbsp;&nbsp;&nbsp;'fruit1'&nbsp;=&gt;&nbsp;'apple',
&nbsp;&nbsp;&nbsp;&nbsp;'fruit2'&nbsp;=&gt;&nbsp;'orange',
&nbsp;&nbsp;&nbsp;&nbsp;'fruit3'&nbsp;=&gt;&nbsp;'grape',
&nbsp;&nbsp;&nbsp;&nbsp;'fruit4'&nbsp;=&gt;&nbsp;'apple',
&nbsp;&nbsp;&nbsp;&nbsp;'fruit5'&nbsp;=&gt;&nbsp;'apple');

//&nbsp;this&nbsp;cycle&nbsp;echoes&nbsp;all&nbsp;associative&nbsp;array
//&nbsp;key&nbsp;where&nbsp;value&nbsp;equals&nbsp;&quot;apple&quot;
while&nbsp;($fruit_name&nbsp;=&nbsp;current($array))&nbsp;{
&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;($fruit_name&nbsp;==&nbsp;'apple')&nbsp;{
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;key($array).'&lt;br&nbsp;/&gt;';
&nbsp;&nbsp;&nbsp;&nbsp;}
&nbsp;&nbsp;&nbsp;&nbsp;next($array);
}
?&gt;

0
0
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