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Many times we need to find duplicate values in an array using php. Using php language this is very easy. For checking the duplicate array value array_unique function is very useful.

There too many array and string functions available in php. PHP itself gives very useful methods for finding the duplicate values from array element.

There are multiple ways to find the duplicate strings. you can use loop and strpos method but using following code snippet, it is very easy to find the duplicate values from an array.

find duplicate values in an array using php

Here I am giving you very simple php example:

<!--?<span class="hiddenSpellError" pre="" data-mce-bogus="1"-->php
 $array1 = array("banana","apple","pear","banana");

 if (count(array_unique($array1)) < count($array1))
 echo 'Duplicate entry found in array';
 else
 echo 'No Duplicate values found in array';
 ?>

Output:  Duplicate entry found in array

Many times we got requirement of check file from specific directory. PHP tutorial for, php check if file exists if not create. Following code will work in all the system like (Mac, Linux and Windows). we given code snippet for checking file exists or not.

Using following php code you can check file is present or not in specific directory.

<?php
 $filename = '/var/www/html/test/test.txt';

 if (file_exists($filename)) {
 echo "The file $filename exists";
 } else {
 echo "The file $filename does not exist";
 }

?>