Chii chinoita PHP microtime chaitika?

Mune imwe yenzvimbo dzine mukurumbira PHP zvirongwa mutauro inopa akapfuma raibhurari mabasa. Mumwe nomumwe wavo ane pachake zvachiri, asi nekuda guru nhamba remapazi uye mazita akafanana kubva Developers kazhinji kunotungamirira kuvhiringidzika. Mibvunzo vanokonzera PHP microtime basa - zvarinoreva uye sei zvakasiyana akafanana naye?

shanda microtime

The PHP microtime somugumisiro anodzoka Unix nguva uye zvakarurama kuti microseconds. Pasinei embeddedness akavhiyiwa mumutauro zvirongwa, hachigoni kushanda zvose hurongwa. Mushanduro anodawo mugadziriro, apo pasina hurongwa runhare gettimeofday () kwokutanga, basa iri ichabereka sizvo zvabuda.

Nemarongerwo microtime () ane chete nharo mumwe - nayo anosarudza hworudzii mashoko anogona kuwanika kudzoka zvabuda. Kana muzvikomberedzo zvakafanana yechokwadi (kubva Chirungu. "Chokwadi"), ipapo pachinzvimbo mashandiro anodzoka kusanganiswa date tambo. Pasina chero parameter (ndiro razero) yakaiswa kuti venhema (kubva Chirungu. "Venhema"), nguva vachange vadzoka pamanyorerwo msec chik. Pano, nhamba yokutanga acharamba uwandu microseconds kuti apfuura kubva pakutanga kuitika wechipiri, uye yechipiri - nguva yose yakapfuura kubvira 1970, akaratidza seconds.

Use PHP microtime () Zvakakodzera ari chiitiko kuti panodikanwa kuziva zvinotora nguva yakareba sei kuti aurayiwe bumbiro nechigumbuso. Kakawanda, mashandiro ichi chinoshandiswa optimize nokushanda purogiramu.

Musiyano nguva

Sezvo zvakafanana kushanda microtime, PHP ane nyore - nguva. Kusiyana zvikuru zvakarurama, "hanzvadzi" ayo, mugumisiro kushandisa mashandiro nguva () - nhamba mumasekonzi kubvira Unix ichikosha, kureva, kubva January 1, 1970, 00:00:00 GMT. With nguva () zvinokwanisika kuti kuwana nguva musiyano pakati maviri pfungwa chepurogiramu, asi nezvishoma zvakarurama.

Kana uchida kuwana hurongwa nguva, unofanira kushandisa basa musi (). Kana zvakakodzera, kuti kufadza nemazvo musiyano, zvakanakisisa kusarudza PHP basa - microtime.