php search key in associative array code example
Example 1: if don't exist key json php
<?php
$search_array = array('first' => 1, 'second' => 4);
if (array_key_exists('first', $search_array)) {
echo "The 'first' element is in the array";
}
?>
Example 2: array search by key in php
$arr = array(
"one" => 1,
"two" => 2,
"three" => 3,
"seventeen" => 17
);
function find($mot){
global $arr;
$ok=false;
foreach ($arr as $k => $v)
{
if($k==$mot){
return $v; $ok=true;
}
}
if(ok==false){ return -1; }
}
echo find("two");