Pre-commit hook to prevent me from checking in syntax errors on my Drupal projects. Put in `.git/hooks` and remove the `.sh` from the filename.

pre-commit.sh

#!/bin/sh
#
# An example hook script to verify what is about to be committed.
# Called by "git commit" with no arguments.  The hook should
# exit with non-zero status after issuing an appropriate message if
# it wants to stop the commit.
#
# Put this file in .git/hooks and name it pre-commit

# Redirect output to stderr.
exec 1>&2

# If there are whitespace errors, print the offending file names and fail.
#exec git diff-index --check --cached $against --

# Lint PHP files
for file in `git diff --name-only --cached | grep -E '\.(php|inc|module|install|profile|test)'`
do
  if [[ -f $file ]]
  then
    php -l $file

    if [[ $? -ne 0 ]]
    then
      exit 1
    fi
  fi
done

cool!