Why Aren't My PHP Errors and Warnings Showing Up?

PHP: Showing All Errors and Warnings

PHP provides the ability to report errors and warnings during the execution of your code. By default, not all errors and warnings are displayed in the web browser.

Why Errors and Warnings May Not Be Displayed on a PHP Page

• display_errors directive in php.ini set to Off
• error_reporting in php.ini does not include E_ALL or E_STRICT
• Output buffering is used and not flushed

Troubleshooting

1. Check php.ini

   Ensure that the display_errors directive is set to On:

   display_errors = On

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   Set error_reporting to include E_ALL and E_STRICT:

   error_reporting = E_ALL | E_STRICT

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2. Use error_reporting()

   In your script, you can use the error_reporting() function to specify the level of errors and warnings that should be reported:

   error_reporting(E_ALL);

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3. Check Output Buffering

   If output buffering is being used, ensure that it is flushed before sending any output to the browser:

   <?php
   // Enable output buffering
   ob_start();
   ?>
   
   <?php
   // Flush any buffered output
   ob_end_flush();
   ?>

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4. Inspect the PHP Error Log

   Even if errors and warnings are not displayed on the web browser, they are typically logged to a file (usually located at /var/log/php-error.log or /var/log/apache2/error.log). You can inspect this file for any reported issues.

Additional Notes

• The PDO class has a method called setAttribute() that allows you to set the error mode. Setting it to PDO::ERRMODE_EXCEPTION will cause PDO to throw exceptions on errors.
• You can use PDOStatement::errorInfo() to get the error message for a PDOStatement.

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