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A pre-commit hook to make PHP code PSR-2 compliant, check for syntax error

View php-cs-fixer-pre-commit.php
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#!/usr/bin/php
<?php
/**
* .git/hooks/pre-commit
*
* This pre-commit hooks will check for PHP error (lint), and make sure the code
* is PSR compliant.
*
* Dependecy: PHP-CS-Fixer (https://github.com/fabpot/PHP-CS-Fixer)
*
* @author Mardix http://github.com/mardix
* @since Sept 4 2012
*
*/
/**
* collect all files which have been added, copied or
* modified and store them in an array called output
*/
exec('git diff --cached --name-status --diff-filter=ACM', $output);
foreach ($output as $file) {
$fileName = trim(substr($file, 1) );
/**
* Only PHP file
*/
if (pathinfo($fileName,PATHINFO_EXTENSION) == "php") {
/**
* Check for error
*/
$lint_output = array();
exec("php -l " . escapeshellarg($fileName), $lint_output, $return);
if ($return == 0) {
/**
* PHP-CS-Fixer && add it back
*/
exec("php-cs-fixer fix {$fileName} --level=all; git add {$fileName}");
} else {
echo implode("\n", $lint_output), "\n";
exit(1);
}
}
}
exit(0);

You may use --name-only parameter of git diff in order to get only name of ACM files

Here is a shell script too.

#!/bin/bash

while read -r file;
do
  file=${file:1}
  if [[ $file = *.php ]];
  then    
    php-cs-fixer fix "$file" --level=psr2
    git add "$file"
  fi
done < <(git diff --cached --name-status --diff-filter=ACM)
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