N'chiyani chimachititsa Php microtime ntchito?

Mu mmodzi wa anthu otchuka chinenero mapulogalamu Php imapereka wolemera ntchito laibulale. Aliyense wa iwo ali ndi makhalidwe ake, koma chifukwa cha kuchuluka kwa ntchito ndi maudindo ofanana kuchokera kutukula zambiri kumayambitsa chisokonezo. Mafunso chifukwa Php microtime ntchito - zimene amachita ndi zimene kumasiyana ndi ofanana ndi iye?

ntchito microtime

The Php microtime chifukwa akubwerera Unix nthawi ndi molondola kuti microseconds. Ngakhale ntchito embeddedness mu chinenero mapulogalamu, izo sizingakhoze kugwira ntchito pa machitidwe onse. Mabaibulo kale kachitidwe opaleshoni, kumene kulibe gettimeofday dongosolo kuitana (), nchito imeneyi udzabala zotsatira pachithunzichi.

Malembedwe microtime () ali mkangano imodzi yokha - Izo zimatengera mtundu wanji deta chingapezeke zotsatira kubwerera. Ngati parentheses lolingana zoona (kwa English. "N'zoona"), ndiyeno mmalo ntchito akubwereranso n'zosangalatsa kumva deta chingwe. Popeza chizindikiro chilichonse (chimene ziro) wayikidwa kwa bodza (kwa English. "Onyenga"), nthawi mudzabwezedwa mu mtundu msec gawo. Apa, nambala yoyamba adzasunga chiwerengero cha microseconds kuti kuchokera pachiyambi cha chachiwiri panopa, ndipo chachiwiri - nthawi okwana imene yapita kuyambira 1970, m'kukoma masekondi.

Ntchito Php microtime () n'kofunika kukachitika kuti pali kufunika kuti tipeze nthawi yaitali bwanji pamafunika kuphedwa kwa chipika ndi code. Nthawi zambiri, njira imeneyi ntchito konza ntchito za pulogalamuyi.

Kusiyana ndi nthawi

Monga ndi ntchito zofanana microtime, Php ali ndi chosavuta - nthawi. Mosiyana ndi zolondola kwambiri, "mlongo" wake, chifukwa cha ntchito ntchito nthawi () - chiwerengero cha masekondi kuyambira Unix lothandiza, yomwe January 1, 1970, 00:00:00 GMT. Ndi nthawi () n'zotheka kupeza nthawi kusiyana pakati pa mfundo ziwiri za pulogalamu, koma ndi zochepa mwatsatanetsatane.

Ngati mukufuna kupeza dongosolo nthawi, muyenera kugwiritsa ntchito tsiku ntchito (). Ngati ndi kotheka, kuti pazipita mwatsatanetsatane kusiyana ndi bwino kusankha Php ntchito - microtime.