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RegEx or Text Replacement for PHP Associative

Last Modified: 2012-05-05
I have a large amount of PHP code that I have taken over from another programmer. However, the previous developer's programming style has been throwing me tons of notice of use of undefined constant's because he didn't quote the array values like the PHP manual recommends. I need a way to easily replace all these values with proper quoting. This is easy enough to do with a simple regex but the problem I am having is that it cannot quote array values that are already in a quoted string.

$array[value] needs to become $array['value']

"$array[value]" should be left alone.
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It is not very simple, because regex is suppose to catch "some text \" text $array[value] $array[value] text \" " what is not trivial.
Also you may have the $array['text']['text'] statements.
The simple $array[value] to $array['value'] replacing can be done with the following regexp:
(\$[a-z_0-9]+\[|'\]\[)([A-Za-z0-9]+)(\]) -> $1'$2'$3 applied multiple times to handle $a[b][c] situations.


What about the regex not operator [^] to weed out values in quotes? I don't have that much experience with the not operator myself, however if I run that regex it will break all the code as there are LOTS of quoted variables.
It is not so easy.
For example:
$result = "asdf $a[test]" . '"\' . "$a[test] . " . '\"';

Is the $a[test] in quotes or not? There can be a lot of such tricky situations and you never know whether the regexp breaks something or not.

This one is on us!
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dooh, please correct my typos:
  perl line misses final ;
  s/fals /false /
sorry for typing too fast ;-)

MIRV, if you wanted to do this in PHP (although I would recommend against doing the mass replacement):
echo "$array[value]";
echo $array[value];
echo "test".$array[value];
echo \'\" test \'.$array[value]."test";
echo "test\" test $array[value] \" test"
echo "test\"".$array[value]."test \" test"';
function quotevalues($matches) {
  if ($matches[1]) {
    return "$matches[1]'$matches[2]'$matches[3]";
  } else {
    return $matches[0];
echo "<pre>$output";

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regex won't work from vim but I suppose I can solve that problem on my end..
> regex won't work from vim ..
regex work in vim too, but they are not perl regex, hence you need to adapt them for vim

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