Php Show Sql Query Error
Contents |
and Objects Namespaces Errors Exceptions Generators References Explained Predefined Variables Predefined Exceptions Predefined Interfaces and Classes Context options and parameters Supported Protocols and Wrappers Security Introduction General php mysqli query error considerations Installed as CGI binary Installed as an Apache module Session
Mysql Error Php
Security Filesystem Security Database Security Error Reporting Using Register Globals User Submitted Data Magic Quotes Hiding PHP php mysql error handling Keeping Current Features HTTP authentication with PHP Cookies Sessions Dealing with XForms Handling file uploads Using remote files Connection handling Persistent Database Connections Safe Mode Command line
Die Mysqli_error
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 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 mysqli errno 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 GUI Extensions 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 mysqli::$field_count » « mysqli::$error_list PHP Manual Function Reference Database Extensions Vendor Specific Database Extensions MySQL MySQLi mysqli Change language: English Brazilian Portuguese Chinese (Simplified) French German Japanese Korean Romanian Russian Spanish Turkish Other Edit Report a Bug mysqli::$error mysqli_error (PHP 5, PHP 7)mysqli::$error -- mysqli_error — Returns a string description of the last error Description Object oriented style string $mysqli->error; Procedural style string mysqli_error ( mysqli $link ) Returns the last error message for the most recent MySQLi function call that can succeed or fail. Parameters link Procedura
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more
Mysqli Prepare Error
about Stack Overflow the company Business Learn more about hiring developers or posting ads
Or Die Mysql Error
with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow mysqli_error() expects exactly 1 parameter is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up how to display MySql error in php up vote 14 down vote http://php.net/manual/en/mysqli.error.php favorite In PHP, I am trying to execute a long MySql query that depends on the user input. However, my query fails with the following message, "Query Failed". Actually I have printed this message whenever the query fails but I am having hard time looking for the reason behind this failure. Unfortunately, I couldn't find it because the error is not specified on the web page. My question is, http://stackoverflow.com/questions/12227626/how-to-display-mysql-error-in-php is there any way to display the error message that caused the failure on the web page. Thank you. Here's my code, $from= "Findings"; $where=""; if($service!= null) { $from = $from . ", ServiceType_Lookup"; $where= "Findings.ServiceType_ID= ServiceType_Lookup.ServiceType_ID AND ServiceType_Name= ". $service; if($keyword!= null) $where= $where . " AND "; } if( $keyword != null) { $where= $where . "Finding_ID LIKE '%$keyword%' OR ServiceType_ID LIKE '%$keyword%' OR Title LIKE '%$keyword%' OR RootCause_ID LIKE '%$keyword%' OR RiskRating_ID LIKE '%$keyword%' OR Impact_ID LIKE '%$keyword%' OR Efforts_ID LIKE '%$keyword%' OR Likelihood_ID LIKE '%$keyword%' OR Finding LIKE '%$keyword%' OR Implication LIKE '%$keyword%' OR Recommendation LIKE '%$keyword%' OR Report_ID LIKE '%$keyword%'"; } $query = "SELECT Finding_ID, ServiceType_ID, Title, RootCause_ID, RiskRating_ID, Impact_ID, Efforts_ID, Likelihood_ID, Finding, Implication, Recommendation, Report_ID FROM ".$from . " WHERE " . $where; echo "wala 2eshiq"; $this->result = $this->db_link->query($query); if (!$this->result) { printf("Query failed: %s\n", mysqli_connect_error()); exit; } $r = mysqli_query($this->db_link, $query); if($r==false) printf("error: %s\n", mysqli_errno($this->db_link)); php mysql share|improve this question asked Sep 1 '12 at 12:16 Traveling Salesman 56131640 You can just use: $this->db_link->error to get the last error message. For all errors use $this->db_link->error_list. –hakre Sep 1 '12 at 12:31 add a comment| 7 Answers 7 active oldest votes up vote 17 down vote accepted Use
& Database Submit Sign UP Login × Login Username Password Login Cancel Not a member? Sign Up Forgot Password? Contact Us PHP MySQL query with error printing How to write SQL using PHP to handle the data in http://www.plus2net.com/php_tutorial/php_mysql_query.php MySQL database? In any database driven script we have to update, add, modify, data in the tables. By using PHP we can do all this using different functions available in PHP. We will start with very basic function, which will execute https://codex.wordpress.org/Class_Reference/wpdb any query written in sql and can be applied to MySQL database. SQL Structured Query Language or popularly known as SQL is an universal language to handle database. An introduction and different types of sql command like select, insert, update mysql error etc you will get in the sql section of this site. There are some advance SQL commands like left join, linking of tables etc to study. If you are not comfortable with SQL any time you can refer the materials in sql section. There are three steps invoved in this process. Connection to database Build the query and execute Display the data First ensure that you have established your mysql connection through PHP. To get the full details on php mysql php show sql connection you can read the article here. If you are using PDO then start with PDO connection string here. PHP Functions & SQL Let us start with the function required to execute one query in PHP. Once you have connection established then we can execute sql command by using PHP function mysql_query(). Here is the syntax of the function. Let us first write the query and store in a variable. We will write a query to create table.$query="CREATE TABLE student ( id int(2) NOT NULL auto_increment, name varchar(50) NOT NULL default '', class varchar(10) NOT NULL default '', mark int(3) NOT NULL default '0', PRIMARY KEY (id) ) TYPE=MyISAM"; We have stored the sql create query in a variable $query and we will pass this as a parameter to the function like below. $rt=mysql_query($query); The above command will execute the query ( stored in variable $query) and we can check the status of the query ( successful or not ) by checking the status of $rt. $rt will be true of the query is successfully executed or it will return false. We will use php if command to check the status of the query. if($rt){echo " Command is successful ";} else {echo "Command is not successful ";} So from the above line we can know that the query has worked or failed. But we will not come to know what the error is if the query has failed. To get the e
the new WordPress Code Reference! Class Reference/wpdb Languages: English • Italiano • 日本語 • Русский • 中文(繁體) • 한국어 • (Add your language) Contents 1 Talking to the Database: The wpdb Class 1.1 Using the $wpdb Object 1.2 A Warning 2 SELECT a Variable 2.1 Examples 3 SELECT a Row 3.1 Examples 4 SELECT a Column 4.1 Examples 5 SELECT Generic Results 5.1 Examples 6 INSERT row 6.1 Examples 7 REPLACE row 7.1 Examples 8 UPDATE rows 8.1 Examples 9 DELETE Rows 9.1 Usage 9.2 Parameters 9.3 Examples 10 Running General Queries 10.1 General Syntax 10.2 Examples 11 Protect Queries Against SQL Injection Attacks 11.1 Placeholders 11.2 Examples 12 Show and Hide SQL Errors 13 Getting Column Information 14 Clearing the Cache 15 Class Variables 15.1 Multi-Site Variables 16 Tables 16.1 Multisite Tables 17 Source File 18 Related 18.1 Articles 18.2 Code Documentation Talking to the Database: The wpdb Class WordPress defines a class called wpdb, which contains a set of functions used to interact with a database. Its primary purpose is to provide an interface with the WordPress database, but can be used to communicate with any other appropriate database. The class source code is loosely based on the ezSQL class; written and maintained by Justin Vincent Using the $wpdb Object Warning: Methods in the wpdb() class should not be called directly. Use the global $wpdb object instead! WordPress provides a global object variable, $wpdb, which is an instantiation of the wpdb class defined in /wp-includes/wp-db.php. By default, $wpdb is instantiated to talk to the WordPress database. To access $wpdb in your WordPress PHP code, declare $wpdb as a global variable using the global keyword, or use the superglobal $GLOBALS in the following manner:
// 1st Method - Declaring $wpdb as global and using it to execute an SQL query statement that returns a PHP object global $wpdb; $results = $wpdb->get_results( 'SELECT * FROM wp_options WHERE option_id = 1', OBJECT ); // 2nd Method - Utilizing the $GLOBALS superglobal. Does not require global keyword ( but may not be best practice ) $results = $GLOBALS['wpdb