include in php

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When we want same code to repeat on other pages that we can add that page using include or require. The difference between them is that include ignore with warning if include file not found while require throws an error.

How to use include and require a php page using include.

<?php include 'includefile.php';

<?php require ‘noFileExists.php’;

// header.php
<?php
  echo "header output";
?>

//mainpage.php
<?php include 'header.php' ?>
<?php 
  echo " body part of the main page";
?>

output of the above both pages is . it does not give error even if header is not present.

header part

body part of the main page.

//mainpage.php
<?php require 'noFileExists.php';
<?php 
  echo " body part of the main page";
?>

if header.php is available it gives the same output but if header not there it gives the error

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include in PHP

How to use include and require a php page using include.

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