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PHP CLI Progress Indicator
I don't know if this is useful to anyone else, but I saw on the Perl forums someone else was looking for a solution to this . I finally had to break out my ASCII tables to figure out \010 is the backspace character I needed.
Anyway, if anyone is interested, I've written a simple progess bar for PHP command line interface (CLI) scripts. I've posted it, including comments, below.
PHP Code:
function progressBar($current, $total, $label)
{
// This function assumes that you start with completion of 0%.
// If the first time you call this function is with 1%
// completion, you will delete the last 106 characters of
// output from your program.
// If this is the case, simply call this function before with
// a hard coded 0.
// check to see if this is the first go-round
if ($current == 0)
{
// this is the first time so output the progess bar label
if ($label == "")
echo "Progress: ";
else if ($label != "none")
echo $label;
// start the bar with a nice edge
echo "|";
}
else
{
// this isn't the first time so remove the previous progress bar
for ($place = 106; $place >= 0; $place--)
{
// echo a backspace to remove the previous character
echo "\010";
}
}
// output the progess bar as it should be
for ($place = 0; $place <= 100; $place++)
{
// output stars if we're finished through this point
// or spaces if not
if ($place <= ($current / $total * 100))
echo "*";
else
echo " ";
}
// end the bar with a nice edge and a label
echo "| 100%";
// check to see if this is the last go-round
if ($current == $total)
{
// this is the end of the progress bar, output an end of line
echo "\n";
}
}
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Not bad, but I've improved it.
PHP Code:
function progressBar($current=0, $total=100, $size=50)
{
// first call must have $current=0,
// otherwise you'll delete some last
// part of your's app output
// percent indicator must be four characters, if shorter, add some spaces
$perc = ($current/$total)*100;
for($i=strlen($perc); $i<=4; $i++)
$perc = ' '.$perc;
$total_size = $size + $i + 3;
// if it's not first go, remove the previous bar
if($current > 0)
{
for($place = $total_size; $place > 0; $place--)
{
// echo a backspace (hex:08) to remove the previous character
echo "\x08";
}
}
// output the progess bar as it should be
for($place = 0; $place <= $size; $place++)
{
// output green spaces if we're finished through this point
// or grey spaces if not
if($place <= ($current / $total * $size))
echo '[42m [0m';
else
echo '[47m [0m';
}
// end a bar with a percent indicator
echo " $perc%";
if($current == $total)
{
// if it's the end, add a new line
echo "\n";
}
}
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Another update
I know this is a fairly old thread but someone might stumble upon it as I have recently. Here is another version of mikiroro's bar with further improvments.
PHP Code:
function progressBar($current=0, $total=100, $label="", $size=50) {
//Don't have to call $current=0
//Bar status is stored between calls
static $bars;
if(!isset($bars[$label])) {
$new_bar = TRUE;
fputs(STDOUT,"$label Progress:\n");
}
if($current == $bars[$label]) return 0;
$perc = round(($current/$total)*100,2); //Percentage round off for a more clean, consistent look
for($i=strlen($perc); $i<=4; $i++) $perc = ' '.$perc; // percent indicator must be four characters, if shorter, add some spaces
$total_size = $size + $i + 3;
// if it's not first go, remove the previous bar
if(!$new_bar) {
for($place = $total_size; $place > 0; $place--) echo "\x08"; // echo a backspace (hex:08) to remove the previous character
}
$bars[$label]=$current; //saves bar status for next call
// output the progess bar as it should be
for($place = 0; $place <= $size; $place++) {
if($place <= ($current / $total * $size)) echo '[42m [0m'; // output green spaces if we're finished through this point
else echo '[47m [0m'; // or grey spaces if not
}
// end a bar with a percent indicator
echo " $perc%";
if($current == $total) {
echo "\n"; // if it's the end, add a new line
unset($bars[$label]);
}
}
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PHP CLI Progress Indicator
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