Clear CMD-shell with php - php

Question

I have this simple php script which outputs a string every second.
<?php
$i = 1;
while(1)
{
exec("cls"); //<- Does not work
echo "test_".$i."\n";
sleep(1);
$i++;
}
I execute the script in the command shell on windows (php myscript.php) and try to clear the command shell before every cycle. But I don't get it to work. Any ideas?

Answer 1

How about this?
<?php
$i = 1;
echo str_repeat("\n", 300); // Clears buffer history, only executes once
while(1)
{
echo "test_".$i."\r"; // Now uses carriage return instead of new line
sleep(1);
$i++;
}
the str_repeat() function executes outside of the while loop, and instead of ending each echo with a new line, it moves the pointer back to the existing line, and writes over the top of it.

Answer 2

can you check this solution
$i = 1;
echo PHP_OS;
while(1)
{
if(PHP_OS=="Linux")
{
system('clear');
}
else
system('cls');
echo "test_".$i."\n";
sleep(1);
$i++;
}

Answer 3

Apparently, you have to store the output of the variable and then print it to have it clear the screen successfully:
$clear = exec("cls");
print($clear);
All together:
<?php
$i = 1;
while(1)
{
$clear = exec("cls");
print($clear);
echo "test_".$i."\n";
sleep(1);
$i++;
}
I tested it on Linux with clear instead of cls (the equivalent command) and it worked fine.

Answer 4

Duplicate of ➝ this question
Under Windows, no such thing as
#exec('cls');
Sorry! All you could possibly do is hunt for an executable (not the cmd built-in command) like here...

Answer 5

You have to print the output to the terminal:
<?php
$i = 1;
while(1)
{
exec("cls", $clearOutput);
foreach($clearOutput as $cleanLine)
{
echo $cleanLine;
}
echo "test_".$i."\n";
sleep(1);
$i++;
}

Answer 6

if it is linux server use following command (clear)
if it is window server use cls
i hope it will work
$i = 1;
while(1)
{
exec("clear"); //<- This will work
echo "test_".$i."\n";
sleep(1);
$i++;
}
second solution
<?php
$i = 1;
echo PHP_OS;
while(1)
{
if(PHP_OS=="Linux")
{
$clear = exec("clear");
print($clear);
}
else
exec("cls");
echo "test_".$i."\n";
sleep(1);
$i++;
}
This one worked for me, tested also.