Finding a Given Value in an Array in PHP

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Q

How To Find a Specific Value in an Array in PHP?

✍: FYIcenter.com

A

There are two functions can be used to test if a value is defined in an array or not:

array_search($value, $array) - Returns the first key of the matching value in the array, if found. Otherwise, it returns false.
in_array($value, $array) - Returns true if the $value is defined in $array.

Here is a PHP script on how to use array_search():

<?php 
$array = array("Perl", "PHP", "Java", "PHP");
print("Search 1: ".array_search("PHP",$array)."\n");
print("Search 2: ".array_search("Perl",$array)."\n");
print("Search 3: ".array_search("C#",$array)."\n");
print("\n");
?>

This script will print:

Search 1: 1
Search 2: 0
Search 3:

⇒ Retrieving All Keys from an Array in PHP

⇐ Verifying If a Key Exists in an Array in PHP

⇑ PHP Built-in Functions for Arrays

⇑⇑ PHP Tutorials

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How To Sort an Array by Keys in PHP? Sorting an array by keys can be done by using the ksort() function. It will re-order all pairs of keys and values based on the alphanumeric order of the keys. Here is a PHP script on how to use ksort(): <?php $mixed = array(); $mixed["Zero"] = "PHP"; $mixe... 2017-01-21, ∼2334🔥, 0💬

Finding a Given Value in an Array in PHP
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Retrieving All Keys from an Array in PHP
How To Get All the Keys Out of an Array in PHP? Function array_keys() returns a new array that contains all the keys of a given array. Here is a PHP script on how to use array_keys(): <?php $mixed = array(); $mixed["Zero"] = "PHP"; $mixed[1] = "Perl"; $mixed["Two"] = "Java"; $mixed["3"] = "C+... 2017-01-21, ∼2091🔥, 0💬

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