Replacing content in double quotes but not if the doubles quotes are in quotes

[zdp]

Ok, so I wasn't able to find an issue similar to what I've been struggling with, so I apologize if it has been answered or is really easy :-P

 

So here's my problem: I am importing a file using file_get_contents and want to replace any text that is inside of a double quote unless the double quote is in a single quote itself.

 

The regex I have now will do the former, but not the latter. The regex I am using is '/"(.+?)"/s', and I am using preg_replace.

 

Here are 2 examples and what their expected results should be:

##div('$$title or "$$title"');
// current results: '$$title or "$view->title"'
// expected results: '$$title or "$$title"'

##div("$$title or '$$title'");
// current results: "$view->title or '$view->title'"
// expected results: "$view->title or '$view->title'"

 

If you notice the first example, the single quoted string should be ignored, whereas right now it is not. That's what I need to fix.

 

Let me know if this makes sense. Thanks!

[effigy]

This is only a basis as unpaired single quotes (apostrophes) may throw off the detection.

 

<pre>
<?php
### $'s escaped for sake of example.
$data = <<<DATA
##div('\$\$title or "\$\$title"');
// current results: '\$\$title or "\$view->title"'
// expected results: '\$\$title or "\$\$title"'

##div("\$\$title or '\$\$title'");
// current results: "\$view->title or '\$view->title'"
// expected results: "\$view->title or '\$view->title'"
DATA;

echo '<b>Original:</b><hr>';
echo $data;

echo '<br><br><b>Split on Double Quote Pairs:</b><hr>';
$pieces = preg_split('/(".*?")/s', $data, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE);
print_r($pieces);

echo '<br><br><b>Double Quote Replacement:</b><hr>';
$singles = 0;
foreach ($pieces as &$piece) {
	$singles += substr_count($piece, "'");
	### No replacement should be made if:
	### 1. The line does not start with a double quote; and
	### 2. If the number of single quotes are not even (closed).
	if (!substr($piece, 0, 1) == '"' || $singles % 2) {
		continue;
	}
	$piece = preg_replace('/"(.*?)"/s', '"====="', $piece);
}
print_r($pieces);

echo '<br><br><b>Reassembled:</b><hr>';
echo join('', $pieces);

?>
</pre>

[printf]

Something like... untested, but it should work.

 

<?php

$text = '##div("$$title1 or \'$$title2\'");
##div(\'$$title3 or "$$title4"\');
';

echo preg_replace_callback ( '/(".*("(?!\')))/Usi', create_function('$match', 'return str_replace ( "\$\$", "\$view->", $match[0] );'), $text );


?>