get_resources()
版本:php7
(PHP 7)
Returns active resources
说明
get_resources([string $type]): array
Returns an array of all currently activeresources, optionally filtered by resource type.
参数
- $type
If defined, this will causeget_resources()to only return resources of the given type.A list of resource types is available.
If thestringUnknownis 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 anarrayof currently active resources, indexed by resource number.
范例
Unfilteredget_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) }
Filteredget_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 arrayget_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()
返回所有已定义函数的数组get_defined_vars()
返回由所有已定义变量所组成的数组
¿Se pueden usar con matrices de más de una dimensión?