get_resource_type

Returns the resource type (PHP 4 >= 4.0.2, PHP 5)
string get_resource_type ( resource handle )

This function gets the type of the given resource.

Parameters

handle: The evaluated resource handle.

Return Values

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 FALSE and generate an error if handle is not a resource.

Examples

Example 2585. get_resource_type() example

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<?php
// prints: mysql link
$c = mysql_connect();

echo get_resource_type($c) . "\n";

// prints: file
$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";
?>

Code Examples / Notes » get_resource_type

jdhawk _at_ gmail

In PHP5 (on Linux), the above example identifies the "file" handler as a 'stream', not 'file'. This can be particularly worrisome if you're trying to determine the type of stream using this function. The alternative is to use <?php stream_get_meta_data() ?>, which returns an array containing "stream_type (string) - a label describing the underlying implementation of the stream."

hessodreamy

Furthermore, this function returns 'stream' on php 4.3 on windows & linux. You if you want to differentiate between a file resource and other stream resources, as stated before stream_get_meta_data() gives you an array which, on my system, contains the following elements which might suggest a file handle: [wrapper_type] => plainfile [stream_type] => STDIO However I've only compared this to a stream from a url, so I include this only as a suggestion.

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