is_resource
PHP function
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(PHP 4, PHP 5, PHP 7, PHP 8)
Finds whether a variable is a resource
Description
is_resource(mixed $value): bool
Finds whether the given variable is a resource.
Parameters
valueThe variable being evaluated.
Return Values
Returns true if value is a resource, false otherwise.
Examples
is_resource() example
php
<?php
$handle = fopen("php://stdout", "w");
if (is_resource($handle)) {
echo '$handle is a resource';
}
?>The above example will output:
output
$handle is a resourceNotes
Note
is_resource() is not a strict type-checking method: it will return false if value is a resource variable that has been closed.