<?php
/**
 * PHP Variable Declaration Finder - Web Interface
 * Save this file in your project root and access it through your browser
 * Regular Mode: Shows all variable declarations found in your PHP files
*  View-Only Mode: Shows only variables used in $view declarations (accessed by adding ?view_only=1 to the URL)
* Download: Get results as JSON by adding ?download=all or ?download=view to the URL
 */

class PHPVariableDeclarationFinder {
    private $variables = [];
    private $viewVariables = [];
    private $rootDir;
    private $onlyViewVars = false;
    
    public function __construct($rootDir = '.', $onlyViewVars = false) {
        $this->rootDir = rtrim($rootDir, '/');
        $this->onlyViewVars = $onlyViewVars;
    }
    
    public function findDeclarations() {
        $this->scanDirectory($this->rootDir);
        
        if ($this->onlyViewVars) {
            return $this->viewVariables;
        }
        
        return $this->variables;
    }
    
    private function scanDirectory($dir) {
        $items = new RecursiveIteratorIterator(
            new RecursiveDirectoryIterator($dir, RecursiveDirectoryIterator::SKIP_DOTS),
            RecursiveIteratorIterator::SELF_FIRST
        );
        
        foreach ($items as $item) {
            if ($item->isFile() && $item->getExtension() === 'php') {
                // Skip scanning this finder script itself
                if (basename($item->getPathname()) === basename($_SERVER['SCRIPT_FILENAME'])) {
                    continue;
                }
                $this->extractDeclarationsFromFile($item->getPathname());
            }
        }
    }
    
    private function extractDeclarationsFromFile($filePath) {
        $content = file_get_contents($filePath);
        
        // Remove comments to avoid false positives
        $content = preg_replace('!/\*.*?\*/!s', '', $content);
        $content = preg_replace('#//.*#', '', $content);
        
        $relativePath = str_replace($this->rootDir . '/', '', $filePath);
        
        // If we're looking for view variables specifically
        if ($this->onlyViewVars) {
            $this->findViewVariables($content, $relativePath);
            return;
        }
        
        // Otherwise proceed with normal variable declaration extraction
        $this->findAllVariableDeclarations($content, $relativePath);
        
        // Additionally find view variables but store them separately
        $this->findViewVariables($content, $relativePath);
    }
    
    private function findAllVariableDeclarations($content, $filePath) {
        // Patterns to match variable declarations
        $patterns = [
            // Variable assignments
            '/\$([a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*)\s*=(?!=)/',
            
            // Function parameters
            '/function\s+\w+\s*\(([^)]*)\)/',
            
            // foreach loops
            '/foreach\s*\(\s*\$\w+\s+as\s+(\$[^=)]+)/',
            
            // Class properties
            '/(?:public|private|protected|var)\s+(\$[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*)/',
            
            // Global declarations
            '/global\s+(\$[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*(?:\s*,\s*\$[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*)*)/',
            
            // Static declarations
            '/static\s+(\$[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*(?:\s*,\s*\$[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*)*)/',
            
            // Catch exception blocks
            '/catch\s*\(\s*\w+\s+(\$[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*)\s*\)/'
        ];
        
        $declarations = [];
        
        // Process regular variable assignments
        if (preg_match_all($patterns[0], $content, $matches)) {
            foreach ($matches[1] as $var) {
                $declarations[] = '$' . $var;
            }
        }
        
        // Process function parameters
        if (preg_match_all($patterns[1], $content, $matches)) {
            foreach ($matches[1] as $paramList) {
                preg_match_all('/\$[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*/', $paramList, $params);
                $declarations = array_merge($declarations, $params[0]);
            }
        }
        
        // Process foreach variables
        if (preg_match_all($patterns[2], $content, $matches)) {
            foreach ($matches[1] as $foreachVars) {
                preg_match_all('/\$[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*/', $foreachVars, $vars);
                $declarations = array_merge($declarations, $vars[0]);
            }
        }
        
        // Process class properties
        if (preg_match_all($patterns[3], $content, $matches)) {
            $declarations = array_merge($declarations, $matches[1]);
        }
        
        // Process global declarations
        if (preg_match_all($patterns[4], $content, $matches)) {
            foreach ($matches[1] as $globalVars) {
                preg_match_all('/\$[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*/', $globalVars, $vars);
                $declarations = array_merge($declarations, $vars[0]);
            }
        }
        
        // Process static declarations
        if (preg_match_all($patterns[5], $content, $matches)) {
            foreach ($matches[1] as $staticVars) {
                preg_match_all('/\$[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*/', $staticVars, $vars);
                $declarations = array_merge($declarations, $vars[0]);
            }
        }
        
        // Process catch block variables
        if (preg_match_all($patterns[6], $content, $matches)) {
            $declarations = array_merge($declarations, $matches[1]);
        }
        
        if (!empty($declarations)) {
            $this->variables[$filePath] = array_unique($declarations);
        }
    }
    
    private function findViewVariables($content, $filePath) {
        // Patterns specifically for $view declarations
        $viewPatterns = [
            // $view = "..."
            '/\$view\s*=\s*([^;]+)/',
            
            // $view .= "..."
            '/\$view\s*\.=\s*([^;]+)/'
        ];
        
        $viewVars = [];
        
        foreach ($viewPatterns as $pattern) {
            if (preg_match_all($pattern, $content, $matches)) {
                foreach ($matches[1] as $viewContent) {
                    // Find variables within the view content
                    // Look for PHP variable pattern with braces like {$variable}
                    if (preg_match_all('/\{\$([a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*)\}/', $viewContent, $varMatches)) {
                        foreach ($varMatches[1] as $var) {
                            $viewVars[] = '$' . $var;
                        }
                    }
                    
                    // Look for PHP variable pattern without braces in double-quoted strings
                    if (strpos($viewContent, '"') !== false && 
                        preg_match_all('/"\s*\.\s*\$([a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*)\s*\.\s*"/', $viewContent, $varMatches)) {
                        foreach ($varMatches[1] as $var) {
                            $viewVars[] = '$' . $var;
                        }
                    }
                    
                    // Look for variables in double-quoted strings
                    if (preg_match_all('/"[^"]*\$([a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*)[^"]*"/', $viewContent, $varMatches)) {
                        foreach ($varMatches[1] as $var) {
                            $viewVars[] = '$' . $var;
                        }
                    }
                }
            }
        }
        
        if (!empty($viewVars)) {
            $this->viewVariables[$filePath] = array_unique($viewVars);
        }
    }
    
    public function getHtmlResults() {
        $resultData = $this->onlyViewVars ? $this->viewVariables : $this->variables;
        $totalVars = 0;
        $totalFiles = 0;
        
        $html = '<div style="font-family: Arial, sans-serif; max-width: 1200px; margin: 0 auto; padding: 20px;">';
        
        if ($this->onlyViewVars) {
            $html .= '<h1>Variables Found in $view Declarations</h1>';
        } else {
            $html .= '<h1>Variable Declarations Found in PHP Files</h1>';
        }
        
        if (empty($resultData)) {
            $html .= '<div style="padding: 20px; background-color: #f8f9fa; border-radius: 5px;">No variables found.</div>';
        } else {
            foreach ($resultData as $file => $vars) {
                $totalFiles++;
                $totalVars += count($vars);
                
                $html .= '<div style="margin-bottom: 20px; border: 1px solid #ddd; border-radius: 5px; overflow: hidden;">';
                $html .= '<div style="padding: 10px; background-color: #f8f9fa; border-bottom: 1px solid #ddd; font-weight: bold;">' . htmlspecialchars($file) . ' <span style="font-weight: normal; color: #666;">(' . count($vars) . ' variables)</span></div>';
                $html .= '<div style="padding: 10px; background-color: #fff;">';
                
                foreach ($vars as $var) {
                    $html .= '<div style="padding: 5px; margin: 2px 0; background-color: #f1f8ff; border-radius: 3px;">' . htmlspecialchars($var) . '</div>';
                }
                
                $html .= '</div></div>';
            }
            
            // Summary section
            $html .= '<div style="margin-top: 20px; padding: 15px; background-color: #f8f9fa; border-radius: 5px;">';
            $html .= '<h2>Summary</h2>';
            
            if ($this->onlyViewVars) {
                $html .= '<p>Total files with $view variables: <strong>' . $totalFiles . '</strong></p>';
                $html .= '<p>Total variables found in $view declarations: <strong>' . $totalVars . '</strong></p>';
            } else {
                $html .= '<p>Total files with variable declarations: <strong>' . $totalFiles . '</strong></p>';
                $html .= '<p>Total variable declarations found: <strong>' . $totalVars . '</strong></p>';
                
                // Show view variables summary if not in view-only mode
                if (!empty($this->viewVariables)) {
                    $viewVarCount = 0;
                    $viewFileCount = count($this->viewVariables);
                    foreach ($this->viewVariables as $vars) {
                        $viewVarCount += count($vars);
                    }
                    
                    $html .= '<div style="margin-top: 15px; padding: 10px; background-color: #e6f7ff; border-radius: 3px;">';
                    $html .= '<p>Additionally found <strong>' . $viewVarCount . '</strong> variables in $view declarations across <strong>' . $viewFileCount . '</strong> files</p>';
                    $html .= '</div>';
                }
            }
            
            $html .= '</div>';
        }
        
        // Toggle button
        $html .= '<div style="margin-top: 20px; text-align: center;">';
        if ($this->onlyViewVars) {
            $html .= '<a href="' . $_SERVER['PHP_SELF'] . '" style="display: inline-block; padding: 10px 15px; background-color: #4CAF50; color: white; text-decoration: none; border-radius: 4px;">Show All Variable Declarations</a>';
        } else {
            $html .= '<a href="' . $_SERVER['PHP_SELF'] . '?view_only=1" style="display: inline-block; padding: 10px 15px; background-color: #2196F3; color: white; text-decoration: none; border-radius: 4px;">Show Only $view Variables</a>';
        }
        $html .= '</div>';
        
        // Download button
        $html .= '<div style="margin-top: 15px; text-align: center;">';
        $html .= '<a href="' . $_SERVER['PHP_SELF'] . '?download=' . ($this->onlyViewVars ? 'view' : 'all') . '" style="display: inline-block; padding: 10px 15px; background-color: #FF9800; color: white; text-decoration: none; border-radius: 4px;">Download Results as JSON</a>';
        $html .= '</div>';
        
        $html .= '</div>';
        
        return $html;
    }
    
    public function exportToJson() {
        $resultData = $this->onlyViewVars ? $this->viewVariables : $this->variables;
        return json_encode($resultData, JSON_PRETTY_PRINT);
    }
}

// ------ MAIN EXECUTION ------

// Set execution time to a higher value to handle large codebases
set_time_limit(300);

// Check for download request
if (isset($_GET['download'])) {
    $viewOnly = ($_GET['download'] === 'view');
    $finder = new PHPVariableDeclarationFinder('.', $viewOnly);
    $finder->findDeclarations();
    
    $filename = $viewOnly ? 'view_variables.json' : 'all_variables.json';
    
    header('Content-Type: application/json');
    header('Content-Disposition: attachment; filename="' . $filename . '"');
    echo $finder->exportToJson();
    exit;
}

// HTML header
?>
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>PHP Variable Finder</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            line-height: 1.6;
            color: #333;
            margin: 0;
            padding: 0;
            background-color: #f5f5f5;
        }
        header {
            background-color: #4a76a8;
            color: white;
            padding: 15px 20px;
            text-align: center;
        }
        header h1 {
            margin: 0;
            font-size: 24px;
        }
        .progress {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background-color: #f1f1f1;
            z-index: 1000;
        }
        .progress-bar {
            height: 100%;
            background-color: #4CAF50;
            width: 0%;
            transition: width 0.3s;
        }
    </style>
</head>
<body>
    <div class="progress"><div class="progress-bar" id="progressBar"></div></div>
    <header>
        <h1>PHP Variable Finder</h1>
    </header>
    
    <script>
        // Simple progress animation
        document.addEventListener('DOMContentLoaded', function() {
            const bar = document.getElementById('progressBar');
            let width = 0;
            const interval = setInterval(function() {
                if (width >= 90) {
                    clearInterval(interval);
                } else {
                    width += Math.random() * 10;
                    if (width > 90) width = 90;
                    bar.style.width = width + '%';
                }
            }, 300);
            
            // When everything is loaded
            window.addEventListener('load', function() {
                bar.style.width = '100%';
                setTimeout(function() {
                    document.querySelector('.progress').style.display = 'none';
                }, 500);
            });
        });
    </script>

<?php
// Process the request
$viewOnly = isset($_GET['view_only']) && $_GET['view_only'] == '1';
$finder = new PHPVariableDeclarationFinder('.', $viewOnly);

// Scan for variables with progress indicator
$finder->findDeclarations();

// Output results as HTML
echo $finder->getHtmlResults();
?>

</body>
</html>