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PHP Manual :: is_resource



is_real || is_scalar || Variable handling Functions || PHP Manual

(PHP 4, PHP 5, PHP 7)

is_resource Finds whether a variable is a resource

Description

bool is_resource ( mixed $var )

Finds whether the given variable is a resource.

Parameters

var

The variable being evaluated.

Return Values

Returns TRUE if var is a resource, FALSE otherwise.

Examples

Example #1 is_resource() example

<?php

$db_link 
= @mysql_connect('localhost''mysql_user''mysql_pass');
if (!
is_resource($db_link)) {
    die(
'Can\'t connect : ' mysql_error());
}

?>

Notes

Note:

is_resource() is not a strict type-checking method: it will return FALSE if var is a resource variable that has been closed.

See Also



is_real || is_scalar || Variable handling Functions || PHP Manual
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