Inherited a PHP nightmare, where to start? [closed]

Answer 1

Most of the time you can tell if a file is being used by using grep.

grep -r "index2.php" *

You can also use the PHP parser to help you cleanup. Here is an example script that prints out the functions that are declared and function calls:

#!/usr/bin/php
type = $rawToken[0];
            $this->contents = $rawToken[1];
        } else {
            $this->type = -1;
            $this->contents = $rawToken;
        }
    }
}

$file = $argv[1];
$code = file_get_contents($file);

$rawTokens = token_get_all($code);
$tokens = array();
foreach ($rawTokens as $rawToken) {
    $tokens[] = new Token($rawToken);
}

function skipWhitespace(&$tokens, &$i) {
    global $lineNo;
    $i++;
    $token = $tokens[$i];
    while ($token->type == T_WHITESPACE) {
        $lineNo += substr($token->contents, "\n");
        $i++;
        $token = $tokens[$i];
    }
}

function nextToken(&$j) {
    global $tokens, $i;
    $j = $i;
    do {
        $j++;
        $token = $tokens[$j];
    } while ($token->type == T_WHITESPACE);
    return $token;
}

for ($i = 0, $n = count($tokens); $i < $n; $i++) {
    $token = $tokens[$i];
    if ($token->type == T_FUNCTION) {
        skipWhitespace($tokens, $i);
        $functionName = $tokens[$i]->contents;
        echo 'Function: ' . $functionName . "\n";
    } elseif ($token->type == T_STRING) {
        skipWhitespace($tokens, $i);
        $nextToken = $tokens[$i];
        if ($nextToken->contents == '(') {
            echo 'Call: ' . $token->contents . "\n";
        }
    }
}