invoking a shell script for compiling a java code through php exec command -


i'm using vps of centos. i've installed java onto it:

java -version
java version "1.8.0_65"
java(tm) se runtime environment (build 1.8.0_65-b17)
java hotspot(tm) 64-bit server vm (build 25.65-b01, mixed mode)

if compile program shell using putty or i'm able using "javac"
however, want invoke shell file ("compilerun.sh"),which accepts 2 parameters:
1. filename compilation(eg. hello.java)
2. classname(eg. hello)
through php file ("run.php") requirement.

the files this:

run.php:-

echo exec("./compilerun $compilefile $classname");  readfile('errorop');

compilerun.sh:-

javac $1 >& errorop; java $2 >& errorop;

but, i'm getting output:

"./compilerun.sh: line 1: javac: command not found "


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