This article provides you with two PHP multithreading. One is to imitate java's multithreading, and the other is to use curl to implement multi-threaded sequential image collection. Let's take a look at it.
Use WEB servers to implement PHP multithreading.
Of course, anyone who has a deep understanding of multithreading knows that multithreading implemented through WEB servers can only imitate some of the effects of multithreading, not in the true sense.
But in any case, it can still meet some of our needs, and can still be used in the need of features similar to multithreading.
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/**
* @ Title: PHP multithreading class (Thread)
* @ Version: 1.0
* @ Author: phper.org.cn <web@phper.org.cn>
* @ Published: 2010-11-2
*
* PHP multithreading application example:
* Require_once 'thread. class. php ';
* $ Thread = new thread ();
* $ Thread-> addthread ('Action _ log', 'A ');
* $ Thread-> addthread ('Action _ log', 'B ');
* $ Thread-> addthread ('Action _ log', 'C ');
* $ Thread-> runthread ();
*
* Function action_log ($ info ){
* $ Log = 'Log/'. microtime ().'. log ';
* $ Txt = $ info. "rnrn ". 'set in '. date ('H: I: s', time ()). (double) microtime (). "rn ";
* $ Fp = fopen ($ log, 'w ');
* Fwrite ($ fp, $ txt );
* Fclose ($ fp );
*}
*/
Class thread {
Var $ hooks = array ();
Var $ args = array ();
Function thread (){
}
Function addthread ($ func)
{
$ Args = array_slice (func_get_args (), 1 );
$ This-> hooks [] = $ func;
$ This-> args [] = $ args;
Return true;
}
Function runthread ()
{
If (isset ($ _ GET ['flag'])
{
$ Flag = intval ($ _ GET ['flag']);
}
If ($ flag | $ flag = 0)
{
Call_user_func_array ($ this-> hooks [$ flag], $ this-> args [$ flag]);
}
Else
{
For ($ I = 0, $ size = count ($ this-> hooks); $ I <$ size; $ I ++)
{
$ Fp = fsockopen ($ _ SERVER ['HTTP _ host'], $ _ SERVER ['server _ port']);
If ($ fp)
{
$ Out = "GET {$ _ SERVER ['php _ SELF ']}? Flag = $ I HTTP/1.1rn ";
$ Out. = "Host: {$ _ SERVER ['HTTP _ host']} rn ";
$ Out. = "Connection: Closernrn ";
Fputs ($ fp, $ out );
Fclose ($ fp );
}
}
}
}
} |
Usage:
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$ Thread = new thread ();
$ Thread-> addthread ('function1', 'info1 ');
$ Thread-> addthread ('func2', 'info2 ');
$ Thread-> addthread ('func3', 'info3 ');
$ Thread-> runthread (); |
Note:
Addthread () is used to add a thread function. The first parameter is the function name, and the subsequent parameter (optional) is the parameter passed to the specified function.
Runthread () Is the function of the execution thread.
Example 2.Use curl to implement multi-threaded image download
It is actually a multi-threaded class implemented by php using curl.) with this class, we can also use this class to execute multi-threaded tasks!
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<? Php
Class curl_multi {
Private $ url_list = array ();
Private $ curl_setopt = array (
'Curlopt _ RETURNTRANSFER '=> 1, // The result is returned to the variable.
'Curlopt _ header' => 0, // whether the http header needs to be returned
'Curlopt _ nobody' => 0, // whether to return the content
'Curlopt _ followlocation' => 0, // auto-tracking
'Curlopt _ timeout' => 6 // TIMEOUT (s)
);
Function _ construct ($ seconds = 30 ){
Set_time_limit ($ seconds );
}
/*
* Set the URL
* @ List Array
*/
Public function setUrlList ($ list = array ()){
$ This-> url_list = $ list;
}
/*
* Set parameters
* @ CutPot array
*/
Public function setOpt ($ cutPot ){
$ This-> curl_setopt = $ cutPot + $ this-> curl_setopt;
}
/*
* Execution
* @ Return array
*/
Public function execute (){
$ Mh = curl_multi_init ();
Foreach ($ this-> url_list as $ I => $ url ){
$ Conn [$ I] = curl_init ($ url );
Foreach ($ this-> curl_setopt as $ key => $ val ){
Curl_setopt ($ conn [$ I], preg_replace ('/(CURLOPT_w {1,})/ie',' $ 0', $ key), $ val );
}
Curl_multi_add_handle ($ mh, $ conn [$ I]);
}
$ Active = false;
Do {
$ Mrc = curl_multi_exec ($ mh, $ active );
} While ($ mrc = CURLM_CALL_MULTI_PERFORM );
While ($ active and $ mrc = CURLM_ OK ){
If (curl_multi_select ($ mh )! =-1 ){
Do {
$ Mrc = curl_multi_exec ($ mh, $ active );
} While ($ mrc = CURLM_CALL_MULTI_PERFORM );
}
}
$ Res = array ();
Foreach ($ this-> url_list as $ I => $ url ){
$ Res [$ I] = curl_multi_getcontent ($ conn [$ I]);
Curl_close ($ conn [$ I]);
Curl_multi_remove_handle ($ mh, $ conn [$ I]); // release resources
}
Curl_multi_close ($ mh );
Return $ res;
}
} |
Example of multi-thread download for php: Download remote Images
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$ Curl_mul = new curl_multi ();
$ Curl_mul-> setUrlList (array ('HTTP: // www. bKjia. c0m/img/logo.jpg ', 'HTTP: // www. bKjia. c0m/img/logo.jpg ', 'HTTP: // www. bKjia. c0m/img/logo.jpg '));
$ A = $ curl_mul-> execute ();
$ I = 1;
Foreach ($ a as $ v ){
Using filename=polici.'.gif ';
$ Fp2 = @ fopen ($ filename, 'A ');
Fwrite ($ fp2, $ v );
Fclose ($ fp2 );
$ I ++;
}
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