Githook to check PHP syntax before committing changes.

Githook for PHP Syntax - composer.json

/**
*
* ******* IMPORTANT *******
* This is not a valid composer.json, but
* only an example of what to add to the valid
* composer.json file in your project.
*
* The scripts here will run with 'composer install' 
* or 'composer update' (though be aware that 'composer
* update' will update everything defined in the
* composer.json file) and only if there is a
* composer.lock file present. The first line will
* copy any files in bin/githooks to .git/hooks/, 
* overwriting any matching files. The second line 
* will make the 'pre-commit' file executable. 
*
**/
{
  .
  .
  .
  .
  "scripts": {
    "post-install-cmd": [
        "cp -Rf bin/githooks/. .git/hooks/",
        "chmod +x .git/hooks/pre-commit"
    ]
  }
  .
  .
  .
  .
}

pre-commit

#!/bin/sh
#
# Githook script to check PHP syntax using 'php -l' in changed files before 
# committing. If the syntax check fails, the script will exit with a non-zero
# status which will halt the commit, printing a custom message along with 
# the PHP syntax error.
#
# To use: copy the script to the path .git/hook/ with the name pre-commit, 
# then modify the permissions to make the script executable.
# 
# Alternatively this can be placed in a directory in the project 
# (e.g. bin/githooks) so that is can be commited to a repo, and
# then use composer to copy the script to .git/hooks/
# and make the file executable (see next file in this gist).
#

status=0
for file in $(git status --porcelain | grep '.php' | awk '$1 != "D" { print $2; }'); do
        msg=$(php -l $file);

        if [ $? -gt 0 ]; then
                printf '\e[5;32;41mPre-commit error found. Commit failed. You shall not pass!!\n\e[m '
                status=1
                echo $msg;
        fi
done

exit $status