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Debugging and Troubleshooting​

Common Issues and Solutions

Issue: Memory Limit Exceeded​

Fatal error: Allowed memory size exhausted

Solutions:​

  • Increase memory_limit in php.ini

  • Optimize code to use less memory

  • Implement pagination for large datasets

  • Use generators for processing large files

Issue: Maximum Execution Time Exceeded​

Fatal error: Maximum execution time exceeded

Solutions:​

  • Increase max_execution_time in php.ini

  • Optimize database queries

  • Implement background job processing

  • Use asynchronous processing

Issue: Database Connection Errors​

SQLSTATE[HY000] [2002] Connection refused

Solutions:​

  • Verify database server is running

  • Check connection credentials

  • Validate network connectivity

  • Review firewall settings

Debug Tools Configuration​

Xdebug Setup​

ini

; php.ini configuration for Xdebug
[xdebug]
zend_extension=xdebug.so
xdebug.mode=debug,develop,coverage
xdebug.start_with_request=yes
xdebug.client_host=localhost
xdebug.client_port=9003
xdebug.idekey=PHPSTORM

Error Logging Configuration​

php

<?php
// Enhanced error handling
set_error_handler(function($severity, $message, $file, $line) {
    $logger = new Logger();
    $logger->error("PHP Error: {$message}", [
        'severity' => $severity,
        'file' => $file,
        'line' => $line,
        'trace' => debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS)
    ]);
});
set_exception_handler(function($exception) {
    $logger = new Logger();
    $logger->error("Uncaught Exception: " . $exception->getMessage(), [
        'file' => $exception->getFile(),
        'line' => $exception->getLine(),
        'trace' => $exception->getTraceAsString()
    ]);
});