Sometime with arrays and loops (i.e. for or do while or foreach) curl_multi_init loses some hits, to work around this problem it is necessary to divide the loop into two parts: the start with key number zero and than, all the rest. In this way the curl_multi_init doesn't lose any hits. I did a lot of test and it seems to work well enough.
<?php
function set_option($x, $y){
curl_setopt($x, CURLOPT_URL, $y);
curl_setopt($x, CURLOPT_HEADER, 0);
curl_setopt($x, CURLOPT_FOLLOWLOCATION, TRUE);
curl_setopt($x, CURLOPT_RETURNTRANSFER, TRUE);
curl_setopt($x, CURLOPT_ENCODING, "gzip,deflate");
}
$nodes = array('http://php.net/manual/it/function.curl-multi-add-handle.php',
'http://php.net/manual/en/function.curl-multi-init.php',
'http://php.net/manual/en/function.curl-multi-setopt.php'
);
$node_count = count($nodes);
$curl_arr = array();
$master = curl_multi_init();
/*
now I put the first part of the array with the start key number zero, add all
options and add the curl_multi_add_handle;
it is necessary to detach this first part to avoid to lose some handles and than running
the loop with the start key number one.
In this way the curl_multi_init doesn't lose anything and seems to be very stable.
*/
$curl_arr[0] = curl_init($nodes[0]);
set_option($curl_arr[0], $nodes[0]);
curl_multi_add_handle($master, $curl_arr[0]);
/*
now the loop can start with key number one
*/
$i = 1;
do {
if ($i!==0){
$curl_arr[$i] = curl_init($nodes[$i]);
set_option($curl_arr[$i], $nodes[$i]);
curl_multi_add_handle($master, $curl_arr[$i]);
}
$i++;
}while($i < $node_count);
$running = NULL;
do {
curl_multi_exec($master,$running);
} while($running);
$results = array();
$q = 0;
do{
$results[$q] = curl_multi_getcontent($curl_arr[$q]);
curl_multi_remove_handle($master, $curl_arr[$q]);
$q++;
}while($q < $node_count);
foreach($results as $value){
echo $value;
}
?>