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2010-05-26T07:07:59Z

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==include_once and require_once will only include a file once==



<source lang="html4strict">

//bar.php:
<?php
print "In bar\n";
?>
//index.php
<?php
include_once "bar.php";
include_once "BAR.php";
include_once "Bar.php";
?>

</source>

==include_once() function verifies whether or not the file has already been included.==



<source lang="html4strict">

If it has been included, include_once() will not execute.
Otherwise, it will include the file as necessary.
Its syntax follows: include_once (file insertion_file)

</source>

==Using include_once to include a file==



<source lang="html4strict">

A sample include file called add.php
<?php
function add( $x, $y ){
return $x + $y;
}
?>

<?php
include_once("add.php");
include_once("add.php");
echo add(2, 2);
?>

</source>

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PHP/Utility Function/include once - История изменений

в 10:37, 26 мая 2010

Admin: 1 версия