get_resource_type

(PHP 4 >= 4.0.2, PHP 5)

get_resource_type — Returns the resource type

Opis

string get_resource_type ( resource $handle )

This function gets the type of the given resource.

Parametry

handle: The evaluated resource handle.

Zwracane wartości

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.

Przykłady

Przykład #1 get_resource_type() example


<?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";
?>

gettype

get_defined_vars

[edit] Last updated: Fri, 23 Mar 2012

add a note User Contributed Notes get_resource_type

avp200681 at gmail dot com 13-Jun-2011 06:11


This function will generate an error and return NULL instead FALSE in the next example:



<?php



$var = 3;

var_dump(get_resource_type($var));



?>

hessodreamy at gmail dot com 29-May-2007 07:07


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.

jdhawk _at_ gmail 05-Oct-2005 04:18


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."

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