$re = '/(?<=\[|,)\s*\'(.*?)\'\s*(?=\]|,)/m';
$str = '[\'Foo\', \'Bar\']
[\'F\'oo\', \'B\'ar\']
[\'F\'oo\', \'B\'ar\',\'Foo\', \'Bar\']
eq(\'Property\', [\'F\'oo\', \'Ba\'r\', \'123\'])';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($matches);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php