continuous - php do something with interval -

i have form, :

<form name="form1" action="" method="post"> <input type="text" name="tfcari" /> <input type="submit" name="btcari" /> </form>  <?php if (isset($_post['btcari'])) {  echo $_post['tfcari'];    ?> 

how doing :

click submit - echo text - wait 5 seconds - echo text (automatically) - wait 5 seconds - echo text (automatically) - ...

thanks all.

php pre-processes before sending website, if put sleep method, delay page frrom displaying long.

the -easiest- way use jquery ajax call, use settimeout echo text every 5 seconds:

// assuming jquery linked $(function() {     // connect php file     $.ajax({         url: 'php-file-with-tfcari-var.php',         type: 'post',         success: function(data) {             // data ajax call returns, let's assume it's $_post variable php             var tfcari = data.tfcari;             // can loop every 5 seconds self calling settimeout method             var poll = (settimeout(function() {                 window.document.write(tfcari);             }, 5000)();         }     }); });