PHP array_diff() Function

<?php

$a1=array("a"=>"red","b"=>"green","c"=>"blue","d"=>"yellow");
$a2=array("e"=>"red","f"=>"green","g"=>"blue");

$result=array_diff($a1,$a2);
print_r($result);

Output:

Array ( [d] => yellow )

Syntex:

array_diff(array1, array2, array3, ...)

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PHP array_column() Function

<?php // An array that represents a possible record set returned from a database $a = array ( array ( 'id' => 5698 , 'first_name' => 'Mehran' , 'last_name' => 'Yaqoob' , ), array ( 'id' => 4767 , 'first_name' => 'Muneeb' , 'last_name' => 'Ahmad' , ), array ( 'id' => 3809 , 'first_name' => 'Uzair' , 'last_name' => 'Rajput' , ) ); $last_names = array_column($a, 'last_name' ); print_r($last_names); ?> Output: Array ( [0] => Yaqoob [1] => Ahmad [2] => Rajput ) Syntex: array_column( array , column_key , index_key ...

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