Home » undefined offset in php

undefined offset in php

Today, We want to share with you undefined offset.In this post we will show you how to fix undefined offset in php, hear for undefined offset: 0 in php we will give you demo and example for implement.In this post, we will learn about How to resolve the “javascript runtime error function is undefineds”? with an example.

how to remove undefined offset error in php

In this tutorial we learn to all about undefineds offset Examples like as a how to fix undefineds offset in php, php array, 0 laravel or many more.

Read Also:  Update Scope Variable using Angular Example

Lets say you have an array that is 2 in size (note that position 1 is accessed with a [0] and position 2 accessed with [1].

$websites[0]= "pakainfo";

$websites[1]= "infinityknow";

and then you try to read $websites[2] such as :-

echo $websites[2];

Well, you never defined a third value in the array it so its out of range, or in php speak undefineds offset.

How to avoid undefined offset error in PHP ?

<?php 
	
// Declare and initialize an array 
// $members = ['Rekha', 'Ashwin', 'Nilesh'] 
$members = array( 
	0 => 'Rekha', 
	1 => 'Ashwin', 
	2 => 'Nilesh'
); 

// Rekha 
echo $members[0]; 

// ERROR: Undefineds offset: 5 
echo $members[5]; 

// ERROR: Undefineds index: key 
echo $members[key]; 
	
?> 

Using isset() function:

<?php 
// $members = ['Rekha', 'Ashwin', 'Nilesh'] 
$members = array( 
	0 => 'Rekha', 
	1 => 'Ashwin', 
	2 => 'Nilesh'
); 

if(isset($members[5])) { 
	echo $members[5]; 
} 
else { 
	echo "Sorry, Your Index not present"; 
} 
	
?> 

using empty() function:

<?php 
	
// Declare and initialize an array 
// $members = ['Rekha', 'Ashwin', 'Nilesh'] 
$members = array( 
	0 => 'Rekha', 
	1 => 'Ashwin', 
	2 => 'Nilesh'
); 

if(!empty($members[5])) { 
	echo $members[5]; 
} 
else { 
	echo "Index not present"; 
} 
	
?> 

Using array_key_exists() function for associative arrays:

<?php 
function Exists($index, $array) { 
	if (array_key_exists($index, $array)) { 
		echo "Key Found"; 
	} 
	else{ 
		echo "Key not Found"; 
	} 
} 

$array = array( 
	"bhakti" => 25, 
	"neha" => 10, 
	"mayuri" => 20 
); 

$index = "neha"; 

print_r(Exists($index, $array)); 
?> 

undefined offset PHP error

function get_match($regex,$content)
{
    if (preg_match($regex,$content,$array)) {
        return $array[0];
    } else {
        return null;
    }

I hope you get an idea about undefineds offset: 0 in php.
I would like to have feedback on my infinityknow.com blog.
Your valuable feedback, question, or comments about this article are always welcome.
If you enjoyed and liked this post, don’t forget to share.

Read Also:  Laravel JSON Encode Decode Handling

Related FAQ

Here are some more FAQ related to this Article:

  1. Read Also:  Simple PHP Data Type Conversion Example
  2. Read Also:  ng-table Pagination using Angular Example
  3. Read Also:  jQuery Fundamentals Tutorial with Examples
  4. Read Also:  html5 email link - mailto Examples
  5. Read Also:  PHP Future
  6. Read Also:  PHP Force File Download HTML button code
  7. Read Also:  Installing Windows step by step - Install Windows 7
  8. Read Also:  PHP GET HTML source code WebPages using DOM Parser
  9. Read Also:  PHP Future
  10. Read Also:  Update Scope Variable using Angular Example

Leave a Comment

Your email address will not be published. Required fields are marked *