pre-commit not working at server side push

Hello list,

I have this bash script to check php syntax error and prevent the commit if there is any

``````````````````` #!/bin/sh

##php_syntax_check

  for i in $(git diff-index --name-only --cached HEAD -- | grep -E '\.(php|engine|theme|install|inc>
        if [ -f $i ]; then
                output=$(/usr/bin/php5 -l $i)
                if [ "$output" == "No syntax errors detected in $i" ];
                then
                        echo "PHP syntax check for $i: OK"
                else
                        echo "=====================================================================>
                        echo "Pause $i for the commit due to PHP parse errors:"
                        echo "$output"
                        exit 1
                fi
        fi
    done

```````````````````

Running fine when placed it at local copy.

I have placed the hook at the server under hooks directory and provided the execute permission also

$ chmod a+x hooks/pre-commit

But even with wrong php syntax I am able to push the file. Have I missed something ?

Thanks