Php include once
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Contents |
include_once
include_once keyword is used to include file content from another file, and it is similar to include(). When include_once include a file, it will check whether the file has already included. If the file has already included, it will not include the file again.
Syntax
include_once 'filepath/file';
Example 1
file1.php
<?php
echo "Hello world. <br/>";
echo "Good to hear. <br/>";
?>
file2.php
<?php
include_once 'file1.php';
include_once 'file1.php';
echo "In this main file";
?>
Output: file1.php included only once
Hello world. Good to hear. In this main file
Example 2
mylist.txt
Leader leads our road path.<br/> Mother cooks our dinner.<br/> Father waste our cloths.<br/> Mother and Father lead our path.<br/> If leader leads our road path,<br/> and Mother and Father is a leader.<br/> Both of them lead our path.<br/>
mypage.php
<?php include_once 'mylist.txt'; echo 'In the world.'; include_once 'mylist.txt'; ?>
Output: The content from mylist.txt is display only once
Leader leads our road path. Mother cooks our dinner. Father waste our cloths. Mother and Father lead our path. If leader leads our road path, and Mother and Father is a leader. Both of them lead our path. In the world.
Related Links
- require
- include
- require_once
- include_once
- goto
