Start and stop a timer PHP

Question

I need some information regarding starting and stopping a timer in PHP  I need to measure the elapsed time from the start of my  exe program  I m using exec   function in my php script  until it completes the execution and display the time it took in seconds     How can I do this

User · Answer

Since PHP 7 3 the hrtime function should be used for any timing    start   hrtime true      execute     end   hrtime true       echo   end -  start                     Nanoseconds echo   end -  start    1000000000       Seconds   The mentioned microtime function relies on the system clock  Which can be modified e g  by the ntpd program on ubuntu or just the sysadmin

User · Answer

You can use microtime and calculate the difference    time pre   microtime true   exec        time post   microtime true    exec time    time post -  time pre    Here s the PHP docs for microtime  http   php net manual en function microtime php

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Use the microtime function  The documentation includes example code

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class Timer       private  startTime   null       public function   construct  showSeconds   true                 this- gt startTime   microtime true           echo  Working - please wait       PHP EOL             public function   destruct                  endTime   microtime true            time    endTime -  this- gt startTime            hours    int   time   60   60            minutes    int   time   60  -  hours   60           seconds    int  time -  hours   60   60 -  minutes   60           timeShow     hours    0    00     hours            minutes    0    00      minutes  lt  10    0     minutes    minutes             seconds    0    00      seconds  lt  10    0     seconds    seconds             echo  Job finished in      timeShow   PHP EOL            t   new Timer       echoes  Working  please wait      some operations   unset  t       echoes  Job finished in h m s

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For your purpose  this simple class should be all you need   class Timer       private  time   null      public function   construct              this- gt time   time            echo  Working - please wait   lt br  gt               public function   destruct             echo   lt br  gt Job finished in    time  - this- gt time    seconds               t   new Timer       echoes  Working  please wait      some operations   unset  t       echoes  Job finished in n seconds   n   seconds elapsed

User · Answer

As alternative  php has a built-in timer controller  new EvTimer     It can be used to make a task scheduler  with proper handling of special cases   This is not only the Time  but a time transport layer  a chronometer  a lap counter  just as a stopwatch but with php callbacks         EvTimer watchers are simple relative timers that generate an event   after a given time  and optionally repeating in regular intervals   after that       The timers are based on real time  that is  if one registers an event   that times out after an hour and resets the system clock to January   last year  it will still time out after roughly  one hour       The callback is guaranteed to be invoked only after its timeout has   passed        If multiple timers become ready during   the same loop iteration then the ones with earlier time-out values are   invoked before ones of the same priority with later time-out values       The timer itself will do a best-effort at avoiding drift  that is  if   a timer is configured to trigger every 10 seconds  then it will   normally trigger at exactly 10 second intervals  If  however  the   script cannot keep up with the timer because it takes longer than   those 10 seconds to do  the timer will not fire more than once per   event loop iteration    The first two parameters allows to controls the time delay before execution  and the number of iterations   The third parameter is a callback function  called at each iteration    after      Configures the timer to trigger after after seconds   repeat      If repeat is 0 0   then it will automatically be stopped once the timeout is reached      If it is positive  then the timer will automatically be configured to trigger again every repeat seconds later  until stopped manually    https   www php net manual en class evtimer php  https   www php net manual en evtimer construct php   w2   new EvTimer 2  1  function   w        echo  is called every second  is launched after 2 seconds n       echo  iteration      Ev  iteration    PHP EOL          Stop the watcher after 5 iterations     Ev  iteration      5 and  w- gt stop           Stop the watcher if further calls cause more than 10 iterations     Ev  iteration    gt   10 and  w- gt stop          We can of course easily create this with basic looping and some tempo with sleep    usleep    or hrtime    but new EvTimer   allows cleans and organized multiples calls  while handling special cases like overlapping

User · Answer

Also you can use HRTime package  It has a class StopWatch

User · Answer

You can use Timer Class       lt  php  class Timer       var  classname    Timer      var  start       0     var  stop        0     var  elapsed     0        Constructor    function Timer   start   true           if    start             this- gt start               Start counting time    function start            this- gt start    this- gt  gettime               Stop counting time    function stop            this- gt stop       this- gt  gettime           this- gt elapsed    this- gt  compute               Get Elapsed Time    function elapsed           if     elapsed             this- gt stop           return  this- gt elapsed             Resets Timer so it can be used again    function reset            this- gt start     0         this- gt stop      0         this- gt elapsed   0                PRIVATE METHODS            Get Current Time    function  gettime            mtime   microtime           mtime   explode        mtime          return  mtime 1     mtime 0              Compute elapsed time    function  compute           return  this- gt stop -  this- gt start            gt

[php] Start and stop a timer PHP

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