Searching by RegExp (Total Commander / PHP)

I'm using Total Commander (file manager), which allows searching file content by regular expressions.

I'd like to search PHP files for deprecated syntax like $_SESSION[user] - so, I need the RegExp for finding all tags, which don't have quotes inside the square brackets.

Any ideas?

This is assuming you don't have defined constants:
\$\w+\[\s*(?:[a-zA-Z]+|[a-zA-Z]+(?:"|')|(?:"|')[a-zA-Z]+)\s*\]

Explanation:

• \$ : match $
• \w+ : match [a-zA-Z0-9_] one or more times
• \[ : match [
• \s* : match white spaces zero or more times
• (?:[a-zA-Z]+|[a-zA-Z]+(?:"|')|(?:"|')[a-zA-Z]+) : match " or ' followed by letters, or just letters, or letters followed by ' or "
• \s* : match white spaces zero or more times
• \] : match ]

Online demo

_{Disclaimer: This will not validate your variables for example $0[aaa] would be matched.}