(PHP 4 >= 4.0.2, PHP 5, PHP 7)
get_resource_type — Returns the resource type
get_resource_type ( resource $handle ) : string
This function gets the type of the given resource.
handle
The evaluated resource handle.
If the given handle
is a resource, this function will return a string representing its type. If the type is not identified by this function, the return value will be the string Unknown
.
This function will return null
and generate an error if handle
is not a resource.
Example #1 get_resource_type() example
<?php // prints: mysql link $c = mysql_connect(); echo get_resource_type($c) . "\n"; // prints: stream $fp = fopen("foo", "w"); echo get_resource_type($fp) . "\n"; // prints: domxml document $doc = new_xmldoc("1.0"); echo get_resource_type($doc->doc) . "\n"; ?>
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https://www.php.net/manual/en/function.get-resource-type.php