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<?php
/**
* OO cURL Class
* Object oriented wrapper for the cURL library.
* @author David Hopkins (semlabs.co.uk)
* @version 0.3
*/
class CURL
{
public $sessions = array();
public $retry = 0;
/**
* Adds a cURL session to stack
* @param $url string, session's URL
* @param $opts array, optional array of cURL options and values
*/
public function addSession( $url, $opts = false )
{
$this->sessions[] = curl_init( $url );
if( $opts != false )
{
$key = count( $this->sessions ) - 1;
$this->setOpts( $opts, $key );
}
}
/**
* Sets an option to a cURL session
* @param $option constant, cURL option
* @param $value mixed, value of option
* @param $key int, session key to set option for
*/
public function setOpt( $option, $value, $key = 0 )
{
curl_setopt( $this->sessions[$key], $option, $value );
}
/**
* Sets an array of options to a cURL session
* @param $options array, array of cURL options and values
* @param $key int, session key to set option for
*/
public function setOpts( $options, $key = 0 )
{
curl_setopt_array( $this->sessions[$key], $options );
}
/**
* Executes as cURL session
* @param $key int, optional argument if you only want to execute one session
*/
public function exec( $key = false )
{
$no = count( $this->sessions );
if( $no == 1 )
$res = $this->execSingle();
elseif( $no > 1 ) {
if( $key === false )
$res = $this->execMulti();
else
$res = $this->execSingle( $key );
}
if( $res )
return $res;
}
/**
* Executes a single cURL session
* @param $key int, id of session to execute
* @return array of content if CURLOPT_RETURNTRANSFER is set
*/
public function execSingle( $key = 0 )
{
if( $this->retry > 0 )
{
$retry = $this->retry;
$code = 0;
while( $retry >= 0 && ( $code[0] == 0 || $code[0] >= 400 ) )
{
$res = curl_exec( $this->sessions[$key] );
$code = $this->info( $key, CURLINFO_HTTP_CODE );
$retry--;
}
}
else
$res = curl_exec( $this->sessions[$key] );
return $res;
}
/**
* Executes a stack of sessions
* @return array of content if CURLOPT_RETURNTRANSFER is set
*/
public function execMulti()
{
$mh = curl_multi_init();
#Add all sessions to multi handle
foreach ( $this->sessions as $i => $url )
curl_multi_add_handle( $mh, $this->sessions[$i] );
do
$mrc = curl_multi_exec( $mh, $active );
while ( $mrc == CURLM_CALL_MULTI_PERFORM );
while ( $active && $mrc == CURLM_OK )
{
if ( curl_multi_select( $mh ) != -1 )
{
do
$mrc = curl_multi_exec( $mh, $active );
while ( $mrc == CURLM_CALL_MULTI_PERFORM );
}
}
if ( $mrc != CURLM_OK )
echo "Curl multi read error $mrc\n";
#Get content foreach session, retry if applied
foreach ( $this->sessions as $i => $url )
{
$code = $this->info( $i, CURLINFO_HTTP_CODE );
if( $code[0] > 0 && $code[0] < 400 )
$res[] = curl_multi_getcontent( $this->sessions[$i] );
else
{
if( $this->retry > 0 )
{
$retry = $this->retry;
$this->retry -= 1;
$eRes = $this->execSingle( $i );
if( $eRes )
$res[] = $eRes;
else
$res[] = false;
$this->retry = $retry;
echo '1';
}
else
$res[] = false;
}
curl_multi_remove_handle( $mh, $this->sessions[$i] );
}
curl_multi_close( $mh );
return $res;
}
/**
* Closes cURL sessions
* @param $key int, optional session to close
*/
public function close( $key = false )
{
if( $key === false )
{
foreach( $this->sessions as $session )
curl_close( $session );
}
else
curl_close( $this->sessions[$key] );
}
/**
* Remove all cURL sessions
*/
public function clear()
{
foreach( $this->sessions as $session )
curl_close( $session );
unset( $this->sessions );
}
/**
* Returns an array of session information
* @param $key int, optional session key to return info on
* @param $opt constant, optional option to return
*/
public function info( $key = false, $opt = false )
{
if( $key === false )
{
foreach( $this->sessions as $key => $session )
{
if( $opt )
$info[] = curl_getinfo( $this->sessions[$key], $opt );
else
$info[] = curl_getinfo( $this->sessions[$key] );
}
}
else
{
if( $opt )
$info[] = curl_getinfo( $this->sessions[$key], $opt );
else
$info[] = curl_getinfo( $this->sessions[$key] );
}
return $info;
}
/**
* Returns an array of errors
* @param $key int, optional session key to retun error on
* @return array of error messages
*/
public function error( $key = false )
{
if( $key === false )
{
foreach( $this->sessions as $session )
$errors[] = curl_error( $session );
}
else
$errors[] = curl_error( $this->sessions[$key] );
return $errors;
}
/**
* Returns an array of session error numbers
* @param $key int, optional session key to retun error on
* @return array of error codes
*/
public function errorNo( $key = false )
{
if( $key === false )
{
foreach( $this->sessions as $session )
$errors[] = curl_errno( $session );
}
else
$errors[] = curl_errno( $this->sessions[$key] );
return $errors;
}
}
?>