一个PHP并发访问实例代码

<?php 
$start=$_GET['s']; 
$end=$_GET['e']; $requests = array(); 
for ($index = $start; $index < $end; $index++) { 
$url="http://www.essort.com/amfphp/services/curl/loadTest.php?uid=$index"; 
$requests[]=$url; 
} 
$main = curl_multi_init(); 
$results = array(); 
$errors = array(); 
$info = array(); 
$count = count($requests); 
for($i = 0; $i < $count; $i++) { 
$handles[$i] = curl_init($requests[$i]); 
var_dump($requests[$i]); 
curl_setopt($handles[$i], CURLOPT_URL, $requests[$i]); 
curl_setopt($handles[$i], CURLOPT_RETURNTRANSFER, 1); 
curl_multi_add_handle($main, $handles[$i]); 
} 
$running = 0; 
do { 
curl_multi_exec($main, $running); 
} while($running > 0); 
for($i = 0; $i < $count; $i++) 
{ 
$results[] = curl_multi_getcontent($handles[$i]); 
$errors[] = curl_error($handles[$i]); 
$info[] = curl_getinfo($handles[$i]); 
curl_multi_remove_handle($main, $handles[$i]); 
} 
curl_multi_close($main); 
var_dump($results); 
var_dump($errors); 
var_dump($info); 
?>