问题
I'm looking for a way to get the instance ID of a given object / resource with PHP, the same way var_dump() does:
var_dump(curl_init()); // resource #1 of type curl
var_dump(curl_init()); // resource #2 of type curl
How can I get the instance count without calling var_dump()? Is it possible?
回答1:
Convert it to an int to get the resource ID:
$resource= curl_init();
var_dump($resource);
var_dump(intval($resource));
回答2:
(int) curl_init()
回答3:
This is a very interesting question... I would be interested to see what you would use this for... but here is one way...
<?php
$ch = curl_init();
preg_match("#\d+#", (string) $ch, $matches);
$resourceIdOne = end($matches);
$ch2 = curl_init();
preg_match("#\d+#", (string) $ch2, $matches);
$resourceIdTwo = end($matches);
?>
回答4:
Convert resource to id with sprintf()
$resource = curl_init();
$id = sprintf('%x', $resource);
// mimic var_dump();
$type = get_resource_type($resource);
echo "resource({$id}) of type ({$type})\n";
回答5:
function get_resource_id($resource) {
if (!is_resource($resource))
return false;
return array_pop(explode('#', (string)$resource));
}
来源:https://stackoverflow.com/questions/1853622/how-to-get-instance-id-with-php