PHP SQL Temporary table won't work - php

I'm trying to understand how the temporary tables work. But even when I copy and paste it from my tutorials, I don't get the expected result.
See the code underneath for more info.
At the moment the .php file returns a blank page (no errors),
while i would expect it to be:
1 Row inserted.
I looked for the error code but found out that temporary tables don't have an error code.
Does someone know what I'm doing wrong?
<?php
$link = mysqli_connect("localhost","xxx","xxx","xxx");
/* check connection */
if (mysqli_connect_errno())
{
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
mysqli_query($link, "CREATE TEMPORARY TABLE myCity (Name CHAR(30)");
$city = "'s Hertogenbosch";
$city = mysqli_real_escape_string($link, $city);
/* this query with escaped $city will work */
if (mysqli_query($link, "INSERT INTO myCity (Name) VALUES ('$city')"))
{
printf("%d Row inserted.\n", mysqli_affected_rows($link));
}
mysqli_close($link);
?>

Looks like you have an error in your sql creation. You are missing a closing parenthesis: ")"
CREATE TEMPORARY TABLE myCity (Name CHAR(30)
Adrien.

this works for me
<?php
ini_set("display_errors",1);
error_reporting(E_ALL);
$mysqli = new mysqli("localhost", "root", "admin123", "test");
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
$mysqli->query("CREATE TEMPORARY TABLE CITIES (
id int(11) NOT NULL,
name varchar(64) NOT NULL
)");
//$mysqli->autocommit(FALSE);
$mysqli->query("INSERT INTO CITIES VALUES ('1', 'Bavaria')");
$mysqli->query("INSERT INTO CITIES VALUES ('2', 'Havana')");
//$mysqli->commit();
if ($result = $mysqli->query("SELECT * FROM CITIES LIMIT 10")) {
printf("Select returned %d rows.\n", $result->num_rows);
/* free result set */
$result->close();
}
//$mysqli->query("DROP TABLE CITIES");
$mysqli->close();
Remember Temporary tables only exist by session, sometimes we need create conventional table and truncate later...
You would must think use DB lib like Doctrine DBAL or ADODb or something like that...

Related

Mysqli multi_query not executing all queries

I'm updating or inserting multiple rows in database tables using Mysqli and multi_query. They work fine when I use them on my local MAMP server but break down when I take them online. On the remote server only three of the four queries are performed...
Both environments have PHP and mysql version 5+ and include "PHP extension: mysqli". The only difference I see is the phpMyAdmin version. The remote server has 3.5.6, my local MAMP server has 4.2.5. Could this have an influence?
I'm of course changing passwords and all variables should be valid since they work locally.
I'm at a loss... Thanks!
$mysqli = new mysqli("localhost", "root", "root", "database");
if ($mysqli->connect_errno) {
echo "Failed to connect to MySQL: (" . $mysqli->connect_errno . ") " . $mysqli->connect_error;
}
$sql = "INSERT INTO categories (id, name, descr) VALUES ('$id1', '$name1', '$descr1') ON DUPLICATE KEY UPDATE name='$name1', descr='$descr1';";
$sql.= "INSERT INTO categories (id, name, descr) VALUES ('$id2', '$name2', '$descr2') ON DUPLICATE KEY UPDATE name='$name2', descr='$descr2';";
$sql.= "INSERT INTO categories (id, name, descr) VALUES ('$id3', '$name3', '$descr3') ON DUPLICATE KEY UPDATE name='$name3', descr='$descr3';";
$sql.= "INSERT INTO categories (id, name, descr) VALUES ('$id4', '$name4', '$descr4') ON DUPLICATE KEY UPDATE name='$name4', descr='$descr4';";
if (!$mysqli->multi_query($sql)) {
echo "Multi query failed: (" . $mysqli->errno . ") " . $mysqli->error;
}else{
echo("Succes.");
}
$mysqli->close()
UPDATE:
Replacing the queries with a single query does work but not very do-able in all scenarios and requires a lot of re-writing... Using hard-coded variables does not help.
$sql2 = "INSERT INTO categories (id, name, descr) VALUES ('$id1', '$name1', '$descr1'), ('$id2', '$name2', '$descr2'), ('$id3', '$name3', '$descr3'),('$id4', '$name4', '$descr4')
ON DUPLICATE KEY UPDATE name=VALUES(name), descr=VALUES(descr)";
Fixed the issue by using the 'Object oriented style' as shown on php.net. Still not sure why my previous approach only worked locally but okay, lets call it fixed.
/* execute multi query */
if ($mysqli->multi_query($query)) {
do {
/* store first result set */
if ($result = $mysqli->store_result()) {
while ($row = $result->fetch_row()) {
printf("%s\n", $row[0]);
}
$result->free();
}
/* print divider */
if ($mysqli->more_results()) {
printf("-----------------\n");
}
} while ($mysqli->next_result());
}
/* close connection */
$mysqli->close();

mysql insert error check

I have a PHP script that collects form data and inserts some of that data into a MySQL database. I just noticed that some inserts/records were NOT, or never created in the database. I would like to write a retry routine that if the insert fails to retry 3 times and then error out to the user.
Just so you can see my code for the DB and the insert so you can see that I am NOT nuts...
mysql_connect($hostname,$username, $password) or die(mysql_error());
mysql_select_db($dbname) or die(mysql_error());
Here is my insert code:
$query = "INSERT INTO contacts VALUES ('','$name','$address','$city','$state','$zip','$phone','$email_address','$arrive','$depart','$room','$found','$promocode','$message','$datetimestamp','$ip')";
mysql_query($query);
mysql_close();
I started out with an IF statement then into a loop but got lost.
#Jay:
So something like this:
$conn = new mysqli($hostname, $username, $password, $dbname);
// check connection
if (mysqli_connect_errno())
{
exit('Connect failed: '. mysqli_connect_error());
}
$query = "INSERT INTO contacts VALUES ('','$name','$address','$city','$state','$zip','$phone','$email_address','$arrive','$depart','$room','$found','$promocode','$message','$datetimestamp','$ip')";
// Performs the $query on the server to insert the values
if ($conn->query($query) === TRUE) {
//echo 'users entry saved successfully';
}
else {
echo 'Error: '. $conn->error;
}
$conn->close();
I am already checking for injection before the insert query
Your query is perfect, make sure that number of parameter you are passing in sql query is same as number of column in database table & parameter value in sql is same order of database table column order

mysql-php INSERT INTO not working

i am trying to insert to a table and get the ID of the new row.
$mysqli = new mysqli("localhost", "dbuser", "dbpass", "dbname");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
$query = "INSERT INTO table (tbl1,tbl2,tbl3,tbl4,tbl5) VALUES ('".$tbll."','".$tbl2."','".$tbl3."','0.00','".$tbl5."'";
$mysqli->query($query);
$id_log = $mysqli->insert_id;
id_log is returning 0 no error anywhere in logs
on same file i am doing SELECT & UPDATE and all work perfectly
You missed a parenthesis here...
$query = "INSERT INTO table (tbl1,tbl2,tbl3,tbl4,tbl5) VALUES ('".$tbll."','".$tbl2."','".$tbl3."','0.00','".$tbl5."')";
----------------------------------------------------------^

mysqli and field types

I'd like to know if there is a simple way to fetch data from mysql tables with "correct" data types? What i mean, if field type is for example INT or SMALLINT is it possible to pass those types directly to PHP as integers?
I did some searching and found mysqli_fetch_fields, but for SMALLIT type is 2, for INT 3 and so on. It could be done that way, but it looks rather clumsy workaround. Is there any better way?
I'm using PHP and mysqli.
Thank you.
The most straightforward way is to build your own database handler on top of the mysqli calls that does that for you.
http://www.php.net/manual/en/mysqli-result.fetch-field-direct.php
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
$query = "SELECT Name, SurfaceArea from Country ORDER BY Name LIMIT 5";
if ($result = $mysqli->query($query)) {
/* Get field information for column 'SurfaceArea' */
$finfo = $result->fetch_field_direct(1);
printf("Name: %s\n", $finfo->name);
printf("Table: %s\n", $finfo->table);
printf("max. Len: %d\n", $finfo->max_length);
printf("Flags: %d\n", $finfo->flags);
printf("Type: %d\n", $finfo->type);
$result->close();
}
/* close connection */
$mysqli->close();
?>
You can use this code
SELECT DATA_TYPE FROM INFORMATION_SCHEMA.COLUMNS
WHERE table_name = 'yourtablename replace your table name' AND COLUMN_NAME = 'tablecolumnname replace your table column name';
Use this before run your main query and after when you get your datatype then execute your operation.

Return variable from stored procedure MySQL

How can I return a declared string like ( lastInsertId ) from my MySQL stored procedure and out? It's really annoying I can't return error messegts, complate messages and more out to my code in PHP5.
I hope somebody can help me here, I have search Google around without luck :(
Thanks to everybody.
The function you need is mysqli->insert_id
This is the example that php.net provides, I think this function is what you are looking for:
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
$mysqli->query("CREATE TABLE myCity LIKE City");
$query = "INSERT INTO myCity VALUES (NULL, 'Stuttgart', 'DEU', 'Stuttgart', 617000)";
$mysqli->query($query);
printf ("New Record has id %d.\n", $mysqli->insert_id);
/* drop table */
$mysqli->query("DROP TABLE myCity");
/* close connection */
$mysqli->close();
?>
You'll find more info here: php.net: mysqli->inert_id - Manual
If you need more help using it I'll be happy to help you.

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