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iTony on 03/10/10

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Last Edited at 03/10/10 11:58am

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Command line progress bar with PHP

/ Published in: PHP

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<?php

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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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POSSIBILITY OF SUCH DAMAGE.

/**
 * show a status bar in the console
 * 
 * <code>
 * for($x=1;$x<=100;$x++){
 * 
 *     show_status($x, 100);
 * 
 *     usleep(100000);
 *                           
 * }
 * </code>
 *
 * @param   int     $done   how many items are completed
 * @param   int     $total  how many items are to be done total
 * @param   int     $size   optional size of the status bar
 * @return  void
 *
 */

function show_status($done, $total, $size=30) {

static $start_time;

// if we go over our bound, just ignore it
    if($done > $total) return;

if(empty($start_time)) $start_time=time();
    $now = time();

$perc=(double)($done/$total);

$bar=floor($perc*$size);

$status_bar="\r[";
    $status_bar.=str_repeat("=", $bar);
    if($bar<$size){
        $status_bar.=">";
        $status_bar.=str_repeat(" ", $size-$bar);
    } else {
        $status_bar.="=";
    }

$disp=number_format($perc*100, 0);

$status_bar.="] $disp%  $done/$total";

$rate = ($now-$start_time)/$done;
    $left = $total - $done;
    $eta = round($rate * $left, 2);

$elapsed = $now - $start_time;

$status_bar.= " remaining: ".number_format($eta)." sec.  elapsed: ".number_format($elapsed)." sec.";

echo "$status_bar  ";

flush();

// when done, send a newline
    if($done == $total) {
        echo "\n";
    }

}

URL: http://brian.moonspot.net/php-progress-bar

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