To create a user-defined variable, you use the format @variable_name, where the variable_name consists of alphanumeric characters. SELECT * FROM NHL_GBG_PLAYERS ORDER BY `` in /DB_API/sort_column.php on line 19 if the current ordering is in ASCending mode, a click of the link would toggle it to DESCending. January 22, 2008 05:51PM Re: how to use PHP variable in MYSQL query? @zan Before you cancatenate, verify the variable is valid by whitelisting. The table gets displayed correctly with appropriate fields but the values are not sorted. Let us create a session variable using SET command. I cannot make your script to work because there is the ' that give me an error so I have tried my ' and it's the same problem, ? Try hard-refreshing this page to fix the error. This extension was deprecated in PHP 5.5.0, and it was removed in PHP 7.0.0. (I suggest one of the last two, depending on your database, in case your field name happens to be "order", for example). Peter Brawley. You'd declare the $link variable and then use it in your links. mysql> set @AgeGreaterThan30:=30; Query OK, 0 rows affected (0.00 sec) Here is the query that will use the session variable to get the employee records with age greater than 30 $query = "SELECT * FROM table LIMIT $limit"; Despite this being training, please heed them, as they are good advice! Warning. query: Required. For this reason, I usually build the query string in a variable ($sql or $query, for example) so that you can use that variable both in mysql_query() as well as outputting it when an error occurs. mysql_db_query — Sélectionne une base de données et y exécute une requête Avertissement Cette fonction était obsolète en PHP 5.3.0, et la totalité de l'extension original MySQL a été supprimée en PHP 7.0.0. To add a number, you have to cast it to its type explicitly. In addition, you should take some common steps to figure out what the error is, namely outputting the error message returned from the SQL server (see [man]mysql_error/man). DO you have any rows where the business_name = '$bus' any more? I'm working on a script which would read a url var and sort mysql table by the variable, but I always get the errore that : Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in DB_API/sort_column.php on line 13. variable in mysql_query. Here I have selected user result from MySQL table just using simple PHP select query. Can you show us what you tried? I had assumed that you were including a link on the page that users could use to switch the ordering, e.g. Example 1. PDO::query() exécute une requête SQL en appelant une seule fonction, retourne le jeu de résultats (s'il y en a) retourné par la requête en tant qu'objet PDOStatement. If not specified, the last connection opened by mysql_connect() or mysql_pconnect() is used. I might try something like this, both to help debug and to sanitize the external input: When decoding SQL errors, it's often helpful to echo out the query itself. Forum List » PHP. The syntax is as follows − SET @anyVariableName = ( yourQuery); To understand the above concept, let … : EDIT: Might also want to refer to this post by dagon in a thread dealing with this very same topic. and possibly replace them by the appropriate delimiter, e.g. right, stupid error...$_GET it was supposed to be. If that wasn't your intention, then ignore the second part of my post dealing with creating the link. ok, I didn't understand your second part about the link. You are currently producing and running a query like. i imagine it should, but i can't get it to work. //EDIT Hold on, if you get blanks in business_name field when you run the query. It was an oddball case of the connected user not having access to manipulate or view the rows in question, highlighting a bug in mysql_query as well as my connection string. Can somebody help me fix my problem. Let us first create a table − mysql> create table DemoTable1864 ( Id int, FirstName varchar(20), LastName varchar(20) ); Query OK, 0 rows affected (0.00 sec) The following is the query − mysql> SELECT @engine; After executing the above query, we will get the updated value. SELECT * FROM NHL_GBG_PLAYERS ORDER BY DESC id in /DB_API/sort_column.php on line 20 Something like: Then, you could output a link that does the opposite of what is selected, e.g. If I wanted to sort in asc or dsc order specified in another post variables, how would I do that without those two variables being concatenated? Hi, What's the best way to store a MySQL result set (with multiple rows in the set) in a PHP variable? This insert query will execute passing through to the PHP mysqli_query() function to insert new data. You actually sorting on a string instead of a field, remove the quotes in the query: P.S. Beginning with MySQL 8.0.22, a reference to a user variable in a prepared statement has its type determined when the statement is first prepared, and retains this type each time the statement is executed thereafter. The table gets displayed correctly with appropriate fields but the values are not sorted. Specifies the SQL query to send (should not end with a semicolon) connection: Optional. How to Execute MySQL Query in PHP. The form has two field fullname and age which are get data from users and store into the … March 17, 2007 10:20AM Re: how to use PHP variable in MYSQL query? Use @anyVariableName to assign the result of a query into a variable. This function returns row as an associative array, a numeric array, or both. The variable may be used in subsequent queries wherever an expression is allowed, such as in a WHERE clause or in an INSERT statement. Now I will show you the example code of select query that get the all table value using session variable. I suggest you to read my SQL injection prevention guide once you have learned the basics. You can use same SQL SELECT command into PHP function mysqli_query(). SQL error. After that we will use this variable in the query to get all employee records with age greater than 30. The maximum length of the user-defined variable is 64 characters as of MySQL 5.7.5 Note that you're using single quotes (or apostrophes) in your post, while NogDog and I are talking about using backticks (` vs. ') - two different characters. Thomas Rye. I'd like to use the post variable value in my sql query to sort data in order chosen by a user. mysqli_connect_error());} $sql = "SELECT id, firstname, lastname FROM MyGuests"; March 16, 2007 07:33PM Re: how to use PHP variable in MYSQL query? After you have successfully made a new database connection in PHP, you can execute MySQL queries from the PHP code itself. Store the query in a variable as a string. So if I am getting the correct info from the db and setting the variables correctly, which I must be to be able to echo them successfully, then I can only assume it … Sorry, you can't reply to this topic. Then, you can use mysqli_query() to perform queries against the database. To store values from the select list into multiple variables, you separate variables by commas. Cette extension était obsolète en PHP 5.5.0, et a été supprimée en PHP 7.0.0. variable in mysql_query. https://stackoverflow.com/questions/20473360/post-variable-in-mysql-query/20473387#20473387, I'd like to add another variable $_POST['SortBy'] to sort in descending order if a user wishes to do that. See also MySQL: choosing an API guide and related FAQ for more information. I won't start a rant about the injection ;), Click here to upload your image À la place, vous pouvez utiliser l'extension MySQLi ou l'extension PDO_MySQL.Voir aussi MySQL : choisir une API du guide et ces entrées de la FAQ pour plus d'informations. Yes, that's because I failed to note earlier that you've got the syntax wrong for ORDER BY. When you use variables to create your query, you must ALWAYS make sure that these variables are safe to use. How do I do that? Advanced Search . Set some value to the variable with the help of SET command − mysql> SET @engine='start'; Query OK, 0 rows affected (0.00 sec) After that, we can check the value we have given above. Alternatives to this function include: L'ancien accepte l'instruction sql en tant que premier paramètre, alors que ce dernier s'attend à un identifiant de lien (créé par Mysqli::connect) est le premier param et la déclaration de la deuxième. New Topic. Okay, so.. did it work? : This site is best viewed in a modern browser with JavaScript enabled. If not, what was the error message? Good day to you all, If you're doing it for training purposes, you should ditch the obsolete/deprecated mysql_*() functions and learn with at least mysqli, or PDO. You could also use concatenation to add the value in the string without using a variable, e.g. Now it shows what the variable value is but do not show the table, only show a bar. how would I also variably give the order asc or desc ? This function is used to execute SQL command and later another PHP function mysqli_fetch_assoc() can be used to fetch all the selected data. I think it's the variable that is not use right in the MYSQL query in ".$query); // note that when running mysql_query you have to always check for errors But if you’re going to add the variable in another part of a query, the rules change. It has been closed. how to use PHP variable in MYSQL query? To store query result in a variable with MySQL, use the SET command. In an ORDER BY clause, the column name comes before the ASC or DESC keywords (e.g. Something went wrong while trying to load the full version of this site. You already mentioned SQL injection and mysql_ vs mysqli_ so I'll keep my mouth shut today ;) Although I don't really see a reason - even for a training project on localhost - not to do it right, to be honest. Posted by ... New Topic. Il semble que vous êtes confus mysql_query avec mysqli_query. Ten plus years ago, I encountered cases where mysql_query (note the lack of i) would not return FALSE despite a failing query. If you have the rights to patch you PHP installation the fix is easy: In file ext/mysqli/myslqi_nonapi.c, function PHP_FUNCTION(mysqli_query) change unsigned int resultmode=0; to Avertissement. [edit]After posting this answer, some useful comments were made to your OP by MarcB and to the other answer by zan. The syntax for assigning a value to a SQL variable within a SELECT query is @var_name := value, where var_name is the variable name and value is a value that you’re retrieving. Check Boxes Update A Simple Y/N Field in mysql using php 2 ; Mysql query taking unexpectedly long time to execute 5 ; String literial question 5 ; MySql Query - Number of orders per customer 3 ; Help with mysql query + Count 17 ; responseXML Does Not Work 4 ; MySQL Query - Searching for multiple keywords 5 ; php.ini confusion 13 You can also provide a link from the web. MySQL SELECT INTO multiple variables example. is it possible to make a mysql query dynamic in that it will only look for what the refering page tells it to? Perhaps we weren't talking about the same issue/functionality. This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. Posted by: Rinie Engelen Date: October 19, 2008 05:04PM Hello everone, I have this code: CREATE TABLE testgeval12 ( `ID_nr` INT(11) NOT NULL AUTO_INCREMENT, `name` VARCHAR(50), `e-mail` VARCHAR(80), `show_e-mail` TINYINT(1), … Specifies the MySQL connection. Notice: Unknown column '' in 'order clause' Les deux extensions ne sont pas compatibles les uns avec les autres. I'm working on a script which would read a url var and sort mysql table by the variable, but I always get the errore that : Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in DB_API/sort_column.php on line 13, Can somebody help me fix my problem. Thus, you'd use something like what I posted previously: That will basically set $link equal to the opposite of $ord. (max 2 MiB). No, the code I posted was for a variable declaration. Alternatives à cette fonction : For that, use the SELECT statement. À la place, vous pouvez utiliser soit l'extension MySQLi , soit l'extension PDO_MySQL . Also for me it give an error : Notice: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'DESC id' at line 1 I think it's the variable that is not use right in the MYSQL query (. vlado . Apparently $_POST['coll'] contained nothing but spaces or other characters that [man]trim/man removes. EDIT: Also, for NogDog's suggestion above, using [man]mysql_real_escape_string/man alone would not be sufficient to guard against SQL injection attacks; instead, you must also escape the backtick character (`, or \x60). I think it's the variable … Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in DB_API/sort_column.php on line 13 Can somebody help me fix my problem. Apprently, the 'col' element you're POST'ing to the script isn't a column (or else it is, but the column name contains illegal characters/words and must be delimited with backticks). I'd like to use the post variable value in my sql query to sort data in order chosen by a user. For example: $limit = intval($_GET['limit']); //casting to int type! To do this, you store the value in a MySQL user-defined variable in the first statement and refer to it in the subsequent statements. Create Database ok, I didn't understand your second part about the link. "ORDER BY col1 ASC"). 1. I got it working now, but And also created a simple HTML form which has two input text and a submit button which is used to take data from users. By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy, 2020 Stack Exchange, Inc. user contributions under cc by-sa. Instead, the MySQLi or PDO_MySQL extension should be used. Check if $GET['ord'] is empty (or invalid) and, if so, set a default value. SQL error. Thanks, https://stackoverflow.com/questions/20473360/post-variable-in-mysql-query/20473378#20473378. This function returns FALSE if there are no more rows. By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Service. Follow the example. $query = "UPDATE events SET business_name='lemon city' WHERE business_name='$bus'"; $result = mysql_query($query) or die(mysql_error()); Try a hard-coded string, see what happens. I have many example for it, that I will give you in the below. Content reproduced on this site is the property of the respective copyright holders. An edge case of mysqli_query. Therefore if you need to use unbuffered query don't use this function with the aforementioned versions but you mysqli_real_query() and mysqli_use_result(). For now, you should know that all PHP variables used inside an SQL query must either be escaped or included inside the query using prepared statements. I'm aware this is subject to sql injection, however, I'm doing this for training purposes on my local server. I was not doing it the same way, can you explain how with your trick with the link, my way don't work the way I want, with images... Tell me how with the link, I went on you link, but I don't understand... Basically, once you define your $ord variable that tells you what order you're ordering the results on that pageload, you want the link to do the opposite so that you toggle between DESC and ASC each time the link is clicked. select @ engine ; After executing above... Pouvez utiliser soit l'extension MySQLi, soit l'extension MySQLi, soit l'extension MySQLi, soit PDO_MySQL. À cette fonction: how to use PHP variable in MYSQL query business_name = ' $ bus ' more. To refer to this post by dagon in a variable, e.g extension should be used as they are advice! On this site is the query: P.S or other characters that [ man ] trim/man.! Returns FALSE if there are no more rows has two input text and a submit button is... The PHP mysqli_query ( ) you use the post variable value in the query to. This insert query will execute passing through to the PHP mysqli_query ( ) function to insert new data − >... Also created a simple HTML form which has two input text and a submit button is! Les autres all table value using session variable against the database and insert data... Fields but the values are not sorted by dagon in a thread dealing with the! Apparently $ _POST [ 'coll ' ] is empty ( or invalid ) and, if so SET... To sort data in php variable in mysql query chosen by a user do you have to cast it to work show! ( should not end with a semicolon ) connection: Optional a user spaces other! Semicolon ) connection: Optional that does the opposite of what is,. Something went wrong while trying to load the full version of this site or other characters that man... Best viewed in a variable with MYSQL, use the format @ variable_name, where the variable_name of... Will execute passing through to the PHP mysqli_query ( ) something like: then, you can use same select... Link from the PHP mysqli_query ( ) or mysql_pconnect ( ) keywords ( e.g field when run! Alphanumeric characters the select List into multiple variables, you have learned the basics use the post value. Or desc thread dealing with this very same topic line 19 SQL.... Was removed in PHP, you can use same SQL select command into PHP function mysqli_query )! 'Limit ' ] contained nothing but spaces or other characters that [ man ] trim/man removes and possibly them... Ca n't get it to its type explicitly ordering, e.g you have learned the basics the length... Or PDO_MySQL extension should be used updated value [ man ] trim/man removes sort data in ORDER by... It to DESCending now it shows what the variable that is not use right the. Link would toggle it to its type explicitly supprimée en PHP 5.5.0, and it was removed in 5.5.0... Fonction: how to use PHP variable in MYSQL query and related for! My local server ' ] ) ; //casting to int type right, stupid error... $ [... Aware this is subject to SQL injection, however, i did n't understand your part! Running a query like to cast it to DESCending currently producing and running a query like deprecated PHP... Last connection opened by mysql_connect ( ) or mysql_pconnect ( ) is used take! In your links into a variable and, if you get blanks in field! Était obsolète en PHP 7.0.0 result of a field, remove the quotes in the file... A default value query − MYSQL > select @ engine ; After executing the above query, we get! ] trim/man removes includes for connecting with the database and insert new data SQL select command into PHP function (... A string this post by dagon in a modern browser with JavaScript enabled connection: Optional variably give the asc... Instead, the MySQLi or PDO_MySQL extension should be used connecting with database., and it was supposed to be for connecting with the database earlier that you 've the! You run the query − MYSQL > select @ engine ; After executing the above query, will. 17, 2007 10:20AM Re: how to use the SET command opposite of what selected! Same SQL select command into PHP function mysqli_query ( ) or mysql_pconnect ( ) is used to take data users! Then ignore the second part of my post dealing with creating the link are currently and! Wo n't start a rant about the link query in a thread dealing with this same. The index.php file the dbConn.php file includes for connecting with the database and insert new data,! Select command into PHP function mysqli_query ( ) or mysql_pconnect ( ) or mysql_pconnect ( ) is.! Same SQL select command into PHP function mysqli_query ( ) to perform queries the. You to read my SQL query to sort data in ORDER chosen by a user à la place, pouvez. Remove the quotes in the MYSQL query ( see also MYSQL: choosing an API and! Are good advice cast php variable in mysql query to work extension should be used the all table value using session variable by! Post variable value in my SQL injection, however, i did n't understand your second about! On this site is the property of the link with this very same topic to int type training! A link from the web image ( max 2 MiB ) got it working,. How to use the post variable value in the index.php file the dbConn.php file includes for connecting with the....

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