Shell script

<?php
// Run the script
exec("/FULL PATH TO SCRIPT/autotrim.sh input.png output.png 2>&1", $array); 

//Display any errors
echo "<br>".print_r($array)."<br>"; 
echo "</pre>";

/* When I ran the code I recived an error:
/autotrim.sh: line 271: bc: command not found
bc is a calculator that is built into Unix/Linux.
I ran the code below to get some information about the path for bc and it did not return anything so I assumed bc was not installed.
I contacted my hosts who installed it and the code worked OK.
*/
echo "<pre>";
system('which bc',$path);
print_r($path); 
echo "</pre>";

//Alternative method using "back ticks"
`/FULL PATH TO SCRIPT/texteffect.sh -t "Anthony" -s glow -e normal -f verdana.ttf -p 48 -c skyblue -b white -o skyblue -l 1 -m 10 -g blue back_tick.png`; 
?>