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Overflow Community Stack Overflow 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 check if a MySQL query http://php.net/manual/en/mysqli.error.php using the legacy API was successful? up vote 30 down vote favorite 5 How do I check if a MySQL query is successful other than using die() I'm trying to achieve... mysql_query($query); if(success){ //move file } else if(fail){ //display error } php mysql share|improve this question edited Jun 13 at 8:52 Álvaro González 81.1k20133201 asked Aug 12 '12 at 0:27 JohnSmith 3892921 add a comment| 6 Answers http://stackoverflow.com/questions/11918797/how-to-check-if-a-mysql-query-using-the-legacy-api-was-successful 6 active oldest votes up vote 50 down vote accepted This is the first example in the manual page for mysql_query: $result = mysql_query('SELECT * WHERE 1=1'); if (!$result) { die('Invalid query: ' . mysql_error()); } If you wish to use something other than die, then I'd suggest trigger_error. share|improve this answer edited Aug 12 '12 at 1:01 answered Aug 12 '12 at 0:29 Mark Byers 449k8810941194 3 Or simply if (!mysql_query('SELECT * WHERE 1=1')) { ... } –Rune Aug 12 '12 at 0:32 1 @Rune: Right, but then you won't be able to use the query resource for further actions (i.e. for fetching actual data using mysql_fetch_* functions). –Amal Murali May 21 '14 at 13:36 @AmalMurali hmm, good point. I'm not sure where I was with my head at the time of posting that comment.. –Rune May 22 '14 at 19:44 1 Use $result === false not !$result. REASON: There may be queries for which $result is a VALID (non-error) value that is equivalent to ZERO. (I think an empty string is another example.) In php, !0 evaluates to true, so your die would execute, even though is not an error. SIMILARLY, wh
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& Database Submit Sign UP Login × Login Username Password Login Cancel Not a member? Sign Up Forgot Password? Contact Us PHP MySQL query with error printing How to write SQL using PHP to handle the data in MySQL database? In any database driven script we have to update, add, modify, data in the tables. By using PHP we can do all this using different functions available in PHP. We will start with very basic function, which will execute any query written in sql and can be applied to MySQL database. SQL Structured Query Language or popularly known as SQL is an universal language to handle database. An introduction and different types of sql command like select, insert, update etc you will get in the sql section of this site. There are some advance SQL commands like left join, linking of tables etc to study. If you are not comfortable with SQL any time you can refer the materials in sql section. There are three steps invoved in this process. Connection to database Build the query and execute Display the data First ensure that you have established your mysql connection through PHP. To get the full details on php mysql connection you can read the article here. If you are using PDO then start with PDO connection string here. PHP Functions & SQL Let us start with the function required to execute one query in PHP. Once you have connection established then we can execute sql command by using PHP function mysql_query(). Here is the syntax of the function. Let us first write the query and store in a variable. We will write a query to create table.$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 wo