I use curl to retrieve web content from another site but there is two problems; first, it takes an average 4 sec period to retrieve the contents and I don't know if there is any way to reduce it; second, some times remote server returns a short error message instead of full content.
I was thinking it would very efficient to send 3 request simultaneously, then check the first received response to see if it's an error or not and check the second respond if the first one was an error. by this method it would not be need to wait a full 4 secs to get retry response if the first one was error. but I don't know if it's possible to doing it.
It would be very appreciated if any one write a simple code to send multiple request simultaneously. Here is my initial code:
<?php
$then = microtime(true);
$url='http://www.example.com/StockInformationHandler.ashx?{%22Type%22:%22getstockprice%22,%22la%22:%22En%22,%22arr%22:%22IRO1LKGH0001,IRO1MADN0001,IRO1KAVR0001,IRO1BHMN0001,IRO1PNBA0001,IRO3ASPZ0001,IRO1IKCO0001,IRO1BANK0001,IRO1IKHR0001,IRO1BDAN0001,IRO1SHND0001,IRO1NBEH0001,IRO1PIAZ0001,IRO1RSAP0001,IRO3DTDZ0001,IRO1TSBE0001,IRO1NAFT0001,IRO1PKHA0001,IRO1AZAB0001,IRO3BMAZ0001,IRO1BANS0001,IRO1BAFG0001,IRO1TAYD0001,IRO1GDIR0001,IRO1SPDZ0001,IRO1NALM0001,IRO1TOSA0001,IRO1BSDR0001,IRO1ZMYD0001,IRO1SBEH0001,IRO3SMBZ0001,IRO1PASN0001,IRO1SPAH0001,IRO1PNES0001,IRO1ALIR0001,IRO1MKBT0001,IRO1FKHZ0001,IRO1RENA0001,IRO1SSHR0001,IRO1PKER0001,IRO1SAHD0001,IRO1BTEJ0001,IRO1DADE0001,IRO1PARK0001,IRO1SKRN0001,IRO1FOLD0001,IRO3KHMZ0001,IRO1NASI0001,IRO3FAYZ0001,IRO1ALMR0001,IRO1NSTH0001,IRO1BMLT0001,IRO1TKSM0001,IRO1AYEG0001,IRO1GTSH0001,IRO1COMB0001,IRO3IMFZ0001,IRO1INDM0001,IRO1DSOB0001,IRO3NPSZ0001,IRO1BPAS0001,IRO1PKOD0001,IRO1OFST0001,IRO3NOLZ0001,IRO1RIIR0001,IRO1ATDM0001,IRO1SNMA0001,IRO1VSIN0001,IRO1MNGZ0001,IRO3PSKZ0001,IRO3KRMZ0001,IRO1AMIN0001,IRO1PRDZ0001,IRO1GLOR0001,IRO1SAJN0001,IRO3BGHZ0001,IRO1PAKS0001,IRO1SIPA0001,IRO1PLKK0001,IRO1KSHJ0001,IRO3BDYZ0001,IRO1LEAB0001,IRO1KHSH0001,IRO1KRIR0001,IRO1PKLJ0001,IRO1HTOK0001,IRO1BPST0001,IRO1TAMI0001,IRO1DTIP0001,IRO1SAND0001,IRO1SHPZ0001,IRO1SHKR0001,IRO1CHAR0001,IRO1ALBZ0001,IRO1LMIR0001,IRO1TRIR0001,IRO3ETLZ0001,IRO1CRBN0001,IRO1SAKH0001,IRO3MSZ93011,IRO1NSAZ0001,IRO3BLSZ0001,IRO1MSMI0001,IRO1TMEL0001,IRO1BALB0001,IRO1LZIN0001,IRO3RFNZ0001,IRO1ABAD0001,IRO1LSMD0001,IRO1DPAK0001,IRO1PLAK0001,IRO1MAVA0001,IRO1GSBE0001,IRO3BIPZ0001,IRO1PSIR0001,IRO1BALI0001,IRO1LIRZ0001,IRO3PKSH0001,IRO1NOVN0001,IRO3GRDZ0001,IRO3PMRZ0001,IRO1ROZD0001,IRO1PABD0001,IRO1SSEP0001,IRO1SGRB0001,IRO1NSPS0001,IRO3ARFZ0001,IRO1GNBO0001,IRO1KHAZ0001,IRO1KIMI0001,IRO1SSIN0001,IRO1PETR0001,IRO1BSTE0001,IRO3DSOZ0001,IRO1TSHE0001,IRO1NMOH0001,IRO1SBAH0001,IRO1TMKH0001,IRO3MNOZ0001,IRO1MAPN0001,IRO1SGAZ0001,IRO1MAGS0001,IRO3PRZZ0001,IRO1HSHM0001,IRO3MSZ93021,IRO1KGND0001,IRO1SGOS0001,IRO1SISH0001,IRO1SKER0001,IRO1KCHI0001,IRO3MRJZ0001,IRO1FRVR0001,IRO1GHEG0001,IRO1KRTI0001,IRO1RINM0001,IRO1GHAT0001,IRO1PSHZ0001,IRO1PNTB0001,IRO1KNRZ0001,IRO1BOTA0001,IRO1GOLG0001,IRT3SATF0001,IRO3AFRZ0001,IRR3ASPZ0101,IRO7ARMP0001,IRO3ZF090001,IRT3SSAF0001,IRT3CASF0001,IRO1ASIA0001,IRO1CONT0001,IRO7BHEP0001,IRO1BAKH0001,IRO1KALZ0001,IRO1KBLI0001,IRO1TRNS0001,IRO1KTAK0001,IRO3BSMZ0001,IRR3BSMZ0101,IRO1SWIC0001,IRO1LAPS0001,IRO1JOSH0001,IRO1MOTJ0001,IRR1MOTJ0101,IRO7MILP0001,IRO1NIRO0001,IRO7BHPP0001,IRO3ZF180001,IRO1ARTA0001,IRO1IPAR0001,IRO1YASA0001,IRO1PASH0001,IRO1TAIR0001,IRO3ZF340001,IRO3ZF140001,IRO7IPTP0001,IRR7IPTP0101,IRO3ZF280001,IRO1DRKH0001,IRO3ZF040001,IRO7SHIP0001,IRO1BARZ0001,IRO1PLST0001,IRO1GAZL0001,IRO1PTAP0001,IRO7HPKP0001,IRO1PIRN0001,IRO7GSIP0001,IRO1MOZI0001,IRO3MSZ93031,IRO3MSZ93041,IRO3MSZ93051,IRO3MSZ93061,IRO3MSZ93071,IRO3MSZ93081,IRO3MSZ93091,IRO3MSZ93101,IRO3MSZ93111,IRO3MSZ93121,IRO3MSZ94011,IRO3MSZ94021,IRO3MSZ94031,IRO3MSZ94041,IRO3MSZ94051,IRO1FROZ0001,IRO1GSKE0001,IRO7NARP0001,IRO1TKNO0001,IRO1MNMH0001,IRO3TORZ0001,IRO1SESF0001,IRO3PMTZ0001,IRO1PMSZ0001,IRO3OSHZ0001,IRO3SGDZ0001,IRO3CGRZ0001,IRO1OFRS0001,IRO1MSKN0001,IRO3PJMZ0001,IRO7BPRP0001,IRO1FIBR0001,IRO1KMSH0001,IRO1KSKA0001,IRO3ZF160001,IRO1NEOP0001,IRO1HJPT0001,IRO3KHZZ0001,IRO7RAHP0001,IRO1HFRS0001,IRO1KFJR0001,IRO7BHKP0001,IRO1AZIN0001,IRO1ATIR0001,IRO1SZPO0001,IRO1RTIR0001,IRO1RADI0001,IRR1CHAR0101,IRO3ZF030001,IRO1FNAR0001,IRO7SDRP0001,IRO1IDOC0001,IRO1KFAN0001,IRO1GOST0001,IRO1LENT0001,IRO1MHKM0001,IRO1MSTI0001,IRO1MNSR0001,IRR1IKCO0101,IRO1MESI0001,IRO1DABO0001,IRO1DOSE0001,IRO1DALZ0001,IRO1PDRO0001,IRO1TMVD0001,IRO1THDR0001,IRO1DJBR0001,IRO7DHVP0001,IRO1DAML0001,IRO1DRZK0001,IRO1DZAH0001,IRO1DSIN0001,IRO1DDPK0001,IRO1ABDI0001,IRO1DFRB0001,IRO1FTIR0001,IRO1DKSR0001,IRO1EXIR0001,IRO1DLGM0001,IRO7PDHP0001,IRO1IRDR0001,IRO3ZOBZ0001,IRO1INFO0001,IRO1EPRS0001,IRO1TKIN0001,IRO1RKSH0001,IRO3ZF120001,IRO3ZF240001,IRO3PZGZ0001,IRO7ZNJP0001,IRO3ZAGZ0001,IRO1AZRT0001,IRO1SDAB0001,IRO1SADB0001,IRO1SURO0001,IRO7IRNP0001,IRO7CBBP0001,IRO1SBOJ0001,IRO3SBZZ0001,IRO1SBHN0001,IRO1PRMT0001,IRO1STEH0001,IRO7SASP0001,IRO1SKHS0001,IRO1SKAZ0001,IRO7SEKP0001,IRO3DBRZ0001,IRO1SDST0001,IRO1SDOR0001,IRO1SROD0001,IRR1SSHR0101,IRO1SIMS0001,IRO1SEFH0001,IRO1SSOF0001,IRB3SSHZ9241,IRO1SFRS0001,IRO1SFKZ0001,IRO1FRDO0001,IRO1SFAS0001,IRO1SFNO0001,IRO1SGEN0001,IRO3SKBZ0001,IRO1SKOR0001,IRO1SMAZ0001,IRO3IBKZ0001,IRO7IENP0001,IRO1SSNR0001,IRO1SHZG0001,IRO1SHGN0001,IRO3SYSZ0001,IRO1SEIL0001,IRO1AMLH0001,IRO3PNLZ0001,IRO1BMPS0001,IRO1PPAM0001,IRO3PTRZ0001,IRO1THSH0001,IRO1TOPI0001,IRO1DODE0001,IRO1SHRG0001,IRO1ZNGN0001,IRO1SEPP0001,IRO7STNP0001,IRO1TSAL0001,IRO1SHSI0001,IRO1PESF0001,IRO1PFRB0001,IRO1SHFS0001,IRR1SHFS0101,IRO1PFAN0001,IRO7PKBP0001,IRO1KAFF0001,IRO1NKOL0001,IRO7SHLP0001,IRO1NPRS0001,IRO1VASH0001,IRT1CSNF0001,IRO1KLBR0001,IRO1BENN0001,IRO1LPAK0001,IRO1MINO0001,IRO1CHCH0001,IRO1KDPS0001,IRO1DMOR0001,IRO1SLMN0001,IRO1SPKH0001,IRO1SPPE0001,IRO1SHAD0001,IRO7MINP0001,IRO1GORJ0001,IRO1GCOZ0001,IRO1MRGN0001,IRO1MRAM0001,IRO1RNAB0001,IRO1NOSH0001,IRO1KIVN0001,IRO1MARK0001,IRO1KSIM0001,IRO1ALTK0001,IRO1SAMA0001,IRO1BAHN0001,IRO1BMAS0001,IRO1BIRI0001,IRO1SPTA0001,IRO1JAMD0001,IRO1FAJR0001,IRO1JSHO0001,IRO1FKAS0001,IRO1FRIS0001,IRO1TFKR0001,IRO3ZF100001,IRO3KZIZ0001,IRO1SEPA0001,IRO1LSDD0001,IRO1SORB0001,IRO1SOLI0001,IRO1LAMI0001,IRO7FANP0001,IRO1NGFO0001,IRO1FVAN0001,IRO1FAIR0001,IRO1GPRS0001,IRO1GPSH0001,IRO3CHRZ0001,IRO1GGAZ0001,IRO1GSHI0001,IRO1GHND0001,IRO3GHSZ0001,IRO1GESF0001,IRO1GMRO0001,IRO1GNJN0001,IRO1ABGN0001,IRO3ZF200001,IRT3SSKF0001,IRO7PKZP0001,IRO1KESF0001,IRO1BAMA0001,IRO1ITAL0001,IRO1IRGC0001,IRO1KPRS0001,IRO1CHML0001,IRO1CHIR0001,IRO1KHFZ0001,IRO1DMVN0001,IRO1TSRZ0001,IRO1ROOI0001,IRO1SINA0001,IRR1SINA0101,IRO1ARDK0001,IRO1PSER0001,IRO1KSAD0001,IRO3KSGZ0001,IRO1TBAS0001,IRO1SHQZ0001,IRO1ALVN0001,IRO1NILO0001,IRO1BHSM0001,IRO1SHMD0001,IRO1VARZ0001,IRO3KBCZ0001,IRO1ASAL0001,IRO1AZMA0001,IRO1PELC0001,IRO1PYAM0001,IRO1JJNM0001,IRO1LKPS0001,IRO1SRMA0001,IRO1KMOA0001,IRO1IAGM0001,IRO3KARZ0001,IRO1BMEL0001,IRO7PMMP0001,IRO3ZF220001,IRR3KHMZ0101,IRO3MIHZ0001,IRO1BROJ0001,IRO1PTOS0001,IRO3ZF060001,IRO1MRIN0001,IRO7BNOP0001,IRO7NIRP0001,IRO3ZF080001,IRO1HMRZ0001,IRO7VHYP0001,IRR1ALBZ0101,IRO1OIMC0001,IRO1TAZB0001,IRO7KARP0001,IRO1BIME0001,IRO1BPAR0001,IRO1DARO0001,IRO1TGOS0001,IRO1TOKA0001,IRO3BKHZ0001,IRO3BMDZ0001,IRO3ZMNZ0001,IRO1SSAP0001,IRO1SDID0001,IRO1SKBV0001,IRR1SKBV0101,IRO7SNAP0001,IRO7SHOP0001,IRO1GBEH0001,IRO7TKDP0001,IRO1KRAF0001,IRO7KOSP0001,IRO3IRNZ0001,IRO7BVMP0001,IRO1MELT0001,IRO1GMEL0001,IRO1SNRO0001,IRO1NIKI0001,IRR3ETLZ0101,IRR1BARZ0101,IRO1KVRZ0001,IRR1TRIR0101,IRR3ZNDZ0101,IRR3ZNDZ0101,IRR1KSKA0101,IRR1DALZ0101,IRO3BLKZ0001,IRR1TKIN0101,IRO1KHOC0001,IRO1CIDC0001,IRR1PNTB0101,IRR1PRDZ0101,IRR3PTRZ0101,IRO3LIAZ0001,IRR1GNJN0101,IRO3TBSZ0001,IRR1PKER0101,IRR1SGAZ0101,IRO1BVMA0001,IRO1MOBN0001,IRR1BMEL0101,IRO3FOHZ0001,IRR1BPAS0101,IRO3BHLZ0001,,%22}';
$ch=curl_init();
$timeout=15;
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
// Get URL content
$lines_string=curl_exec($ch);
curl_close($ch);
$now = microtime(true);
echo sprintf("Elapsed: %f", $now-$then);
$lines_string;
echo "\r\n";
?>
