php key exists
// Here's our fruity array
$fruits = ['apple', 'pear', 'banana'];
// Use it in an `if` statement
if (array_key_exists("banana", $fruits)) {
// Do stuff because `banana` exists
}
// Store it for later use
$exists = array_key_exists("peach", $fruits);php find key in array
<?php
$search_array = array('first' => 1, 'second' => 4);
if (array_key_exists('first', $search_array)) {
echo "The 'first' element is in the array";
}
?>array search by key in php
$arr = array(
"one" => 1,
"two" => 2,
"three" => 3,
"seventeen" => 17
);
function find($mot){
global $arr; // this is global variable
$ok=false;
foreach ($arr as $k => $v)
{
if($k==$mot){
return $v; $ok=true; // or return true;
}
}
if(ok==false){ return -1; } // or return false;
}
//call function
echo find("two");Copyright © 2021 Codeinu
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