Search in Key/ Index of an Associative PHP Array
PHP function array_search() search in array's value part.
I got three methods which have provided working solutions with varying process time.
<?php
if (in_array ($search_term, array_keys($array1)))) {
// Search item found
}
?>Time taken = 4.02911
2. Using array_key_exists
<?php
if (array_key_exists ($search_term, $array1)) {
// $search term found
}
?>Time taken = 3.8229
3. Directly putting search term in key
<?php
if (isset ($array1[$search_term])) {
// $search item found
}
?>Time taken = 3.77827
First two will always work. Third will fails when value part of a key will have NULL value. Those entry with NULL in value part will not be considered in the search method using isset() function.
Getting value of the matched key:
Now, you know that your key exist in an Array. How to get the searched key's value?
Suppose, $companyId is the key you searched above.
1. Generic method and not so tasty:
<?php
foreach ($shortCodes as $shortCode=>$CID)
{
if ($CID == $companyId)
{
$myShortCode = $shortCode;
break;
}
}
?>
2. Useful and short one:
<?php
$myShortCodeArr = array_keys($shortCodes, $companyId);
?>
It will return you array.
The above methods of searching works only for one Dimensional array. Once I run into problem of multidimensional array.
Here is a tested code working in Class.
class test {
function test() {
$orderRow = array('pick_up'=> 'US', 'test' => 2);
array_walk_recursive($orderRow, array($this, 'myKey'));
var_dump( $this->pickUp);
}
function myKey($item, $key) {
if ($key === 'pick_up') {
$this->pickUp = $item; // searched Term
}
}
}
$a = new test();
Passing "$this" is important for array_walk_recursive() working in class. Remove the $this var and it is ready for functional method.
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The fastest way to search for a key in an array is ofcourse to do like this: $array['searchterm'].
The fastest way to search for a key in an array is ofcourse to do like this:
$array['searchterm'].