PHP: vsprintf - Manual

User Contributed Notes
vsprintf

tbS dot P dot A dot M at S dot U dot K dot Staylorbarstow dot com
01-Mar-2005 01:49


Simple but useful routine:



<?php

function vsprintf_iter($fmt,$data) {

    if (!is_array($data)) return false;

    $ret = '';

    foreach ($data as $d) {

        $ret .= vsprintf($fmt,$d);

    }

    return $ret;

}

?>

jed at NOSPAM dot jed dot bz
22-May-2004 08:48


vsprintf() accepts arrays with any keys, so the array_shift() technique is unnecessary when writing a printf-type function. Any parameters you require are easily unset from the array you retrieve with func_get_args():



<?php



function mysprintf($format) {

    $args = func_get_args();

    unset($args[0]); /* get rid of "$format" */

    return vsprintf($format, $args);

}



/* I use this technique in production code as follows: */

function logf($target, $string) {

    $args = func_get_args();

    unset($args[0], $args[1]);

    fprintf($GLOBALS['config']['logtargets'][$target],

        "[%s] %s\n", date('H:i'), wordwrap(vsprintf($string, $args), 75, '\n\r '));

}



/* e.g.:

    logf(DEBUG, "Oops! %s", mysql_error());

 */



?>



array_shift() and other costly array operations aren't required, as far as I know. I could be wrong.

drm at melp dot nl
29-Jan-2004 11:02


When combining with func_get_args as above, you might want to consider using array_shift:





<?


function someFunc () {


   $args = func_get_args ();


   $format = array_shift ( $args );


   // do something


   return vsprintf ( $format, $args );


}


?>





keeps it clean ;)

samviseNOSPAM at hobbitonNOSPAM dot it
02-Jul-2002 08:55


i wrote a short function that make use of vsprintf. It is useful in first coding/debugging of php scripts, because it is called like a simple printf and it display in italic (you can change it of course ;-) ) every debug messages, making it easy to remove them when your code is ready.





here goes :





<?php


function printd() {


        $debug_array=func_get_args();


        $debug_numargs=func_num_args();


        $debug_fmt=$debug_array[0];


        for ( $i = 0 ; $i < $debug_numargs ; $i++ )


                $debug_array[$i] = $debug_array[$i+1];


        $debug_text=vsprintf($debug_fmt, $debug_array);


        printf("--> debug <i>%s</i>\n",


                $debug_text);


}


?>

vsprintf

Description