文字
get_resources
(PHP 7)
get_resources — Returns active resources
说明
array get_resources
([ string
$type
] )Returns an array of all currently active resource s, optionally filtered by resource type.
参数
-
type -
If defined, this will cause get_resources() to only return resources of the given type. A list of resource types is available.
If the string Unknown is provided as the type, then only resources that are of an unknown type will be returned.
If omitted, all resources will be returned.
返回值
Returns an array of currently active resources, indexed by resource number.
范例
Example #1 Unfiltered get_resources()
<?php
$fp = tmpfile ();
var_dump ( get_resources ());
?> 以上例程的输出类似于：
array(1) {
[1]=>
resource(1) of type (stream)
}
Example #2 Filtered get_resources()
<?php
$fp = tmpfile ();
var_dump ( get_resources ( 'stream' ));
var_dump ( get_resources ( 'curl' ));
?> 以上例程的输出类似于：
array(1) {
[1]=>
resource(1) of type (stream)
}
array(0) {
}
参见
- get_loaded_extensions() - 返回所有编译并加载模块名的 array
- get_defined_constants() - 返回所有常量的关联数组，键是常量名，值是常量值
- get_defined_functions() - Returns an array of all defined functions
- get_defined_vars() - 返回由所有已定义变量所组成的数组