How To See Sql Error In Php
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Errors Exceptions Generators References Explained Predefined Variables Predefined Exceptions Predefined Interfaces and Classes Context options and parameters php mysqli error Supported Protocols and Wrappers Security Introduction General considerations Installed as mysql error php CGI binary Installed as an Apache module Session Security Filesystem Security Database Security Error
Php Mysql Error Handling
Reporting Using Register Globals User Submitted Data Magic Quotes Hiding PHP Keeping Current Features HTTP authentication with PHP Cookies Sessions Dealing with XForms
Php Mysql Query Error
Handling file uploads Using remote files Connection handling Persistent Database Connections Safe Mode Command line usage Garbage Collection DTrace Dynamic Tracing Function Reference Affecting PHP's Behaviour Audio Formats Manipulation Authentication Services Command Line Specific Extensions Compression and Archive Extensions Credit Card Processing Cryptography Extensions Database Extensions or die mysql error Date and Time Related Extensions File System Related Extensions Human Language and Character Encoding Support Image Processing and Generation Mail Related Extensions Mathematical Extensions Non-Text MIME Output Process Control Extensions Other Basic Extensions Other Services Search Engine Extensions Server Specific Extensions Session Extensions Text Processing Variable and Type Related Extensions Web Services Windows Only Extensions XML Manipulation Keyboard Shortcuts? This help j Next menu item k Previous menu item g p Previous man page g n Next man page G Scroll to bottom g g Scroll to top g h Goto homepage g s Goto search(current page) / Focus search box mysql_escape_string » « mysql_errno PHP Manual Function Reference Database Extensions Vendor Specific Database Extensions MySQL MySQL (Original) MySQL Functions Change language: English Brazilian Portuguese Chinese (Simplified) French German Japanese Korean Romanian Russian Spanish Turkish Other Edit Report
Errors Exceptions Generators References Explained Predefined Variables Predefined Exceptions Predefined Interfaces and Classes Context options and parameters Supported Protocols and Wrappers Security Introduction General considerations Installed as CGI binary Installed as an Apache
Mysqli_query Error
module Session Security Filesystem Security Database Security Error Reporting Using Register Globals mysql_query error User Submitted Data Magic Quotes Hiding PHP Keeping Current Features HTTP authentication with PHP Cookies Sessions Dealing with XForms die(mysql_error()) Handling file uploads Using remote files Connection handling Persistent Database Connections Safe Mode Command line usage Garbage Collection DTrace Dynamic Tracing Function Reference Affecting PHP's Behaviour Audio Formats Manipulation Authentication Services http://php.net/manual/en/function.mysql-error.php Command Line Specific Extensions Compression and Archive Extensions Credit Card Processing Cryptography Extensions Database Extensions Date and Time Related Extensions File System Related Extensions Human Language and Character Encoding Support Image Processing and Generation Mail Related Extensions Mathematical Extensions Non-Text MIME Output Process Control Extensions Other Basic Extensions Other Services Search Engine Extensions Server Specific Extensions Session Extensions Text Processing Variable and http://php.net/manual/en/pdo.errorinfo.php Type Related Extensions Web Services Windows Only Extensions XML Manipulation Keyboard Shortcuts? This help j Next menu item k Previous menu item g p Previous man page g n Next man page G Scroll to bottom g g Scroll to top g h Goto homepage g s Goto search(current page) / Focus search box PDO::exec » « PDO::errorCode PHP Manual Function Reference Database Extensions Abstraction Layers PDO PDO Change language: English Brazilian Portuguese Chinese (Simplified) French German Japanese Korean Romanian Russian Spanish Turkish Other Edit Report a Bug PDO::errorInfo (PHP 5 >= 5.1.0, PHP 7, PECL pdo >= 0.1.0)PDO::errorInfo — Fetch extended error information associated with the last operation on the database handle Description public array PDO::errorInfo ( void ) Return Values PDO::errorInfo() returns an array of error information about the last operation performed by this database handle. The array consists of the following fields: Element Information 0 SQLSTATE error code (a five characters alphanumeric identifier defined in the ANSI SQL standard). 1 Driver-specific error code. 2 Driver-specific error message. Note: If the SQLSTATE error code is not set or there is no driver-s
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gives a consistent, object-oriented interface to handling all kinds of relational database backends. One thing that annoys me is that the MySQL driver for PDO defaults to a silent error mode which can make SQL errors tricky to spot! To give you an example, consider the query below (the correct tablename is country, so this SQL will fail): $db = new PDO('mysql:host=localhost;dbname=sakila', 'user', 'pass'); $sql = 'select * from countrt'; $stmt = $db->query($sql); while(($row = $stmt->fetch()) != false) { echo $row['country'] . "\n"; } The script will output an error because $stmt is not an object. You have a few options here - you can check that you got an object back before you try to do anything with it, for example. Alternatively you can prepare() and then execute() the statement, which means that you'll have a statement object and if there are any errors, they'll be available. This gives code that looks something like: $db = new PDO('mysql:host=localhost;dbname=sakila', 'user', 'pass'); $sql = 'select * from countrt'; $stmt = $db->prepare($sql); $stmt->execute(); if($stmt->errorCode() == 0) { while(($row = $stmt->fetch()) != false) { echo $row['country'] . "\n"; } } else { $errors = $stmt->errorInfo(); echo($errors[2]); } This way, we can check if we got errors and examine what they are if we did. (if you're coming on my database course next week, you'll see this example and also a demonstration of how to change this silent behaviour. I will endeavour to write about changing it here as well at some point). The main thing to look out for is that it is easy to miss the difference between getting no results because there aren't any and getting no results because there's an error that you can't see - and I hope this code example shows how you can interrogate PDO to find out which one it was! This entry was posted in php and tagged database, mysql, pdo, php by lornajane. Bookmark the permalink. Post navigation ← Previous Next → 25 thoughts on “Handling SQL Errors in PDO” Czarek on November 16, 2011 at 13:28 said: Add this line after you connect and sql errors will behave as all other php errors: $PDO->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_WARNING); To catch them by yourself add your own error handling using set_error_handler(). Reply ↓ Bob on November 16, 2011 at 14:07 said: You even can use PDO::ERRMODE_EXCEPTION as the second argument. It will fire exceptions and let you cathc them when you need. Reply ↓ lornajane on November 16, 2011 at 14:10 said: Thanks for commenting :) I usually use the exceptions setting, and it's this that