get_resource_type

(PHP 4 >= 4.0.2, PHP 5)

get_resource_type — Devuelve el tipo de recurso

Descripción

string get_resource_type ( resource $handle )

Esta función obtiene el tipo del recurso dado.

Parámetros

handle: El gestor de recurso evaluado.

Valores devueltos

Si el dado handle es un recurso esta función devolverá una cadena que representa su tipo. Si el tipo no es identificado por esta función, el valor de retorno será la cadena Unknown.

Está función devolverá FALSE y generará un error si handle no es un resource.

Ejemplos

Ejemplo #1 Ejemplo deget_resource_type()


<?php
// imprime: mysql link
$c = mysql_connect();
echo get_resource_type($c) . "\n";

// imprime: file
$fp = fopen("foo", "w");
echo get_resource_type($fp) . "\n";

// imprime: domxml document
$doc = new_xmldoc("1.0");
echo get_resource_type($doc->doc) . "\n";
?>

gettype

get_defined_vars

[edit] Last updated: Fri, 25 May 2012

add a note User Contributed Notes get_resource_type

avp200681 at gmail dot com 13-Jun-2011 03:11


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 04:07


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 01:18


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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