I have an external database that I am trying to access from within a Drupal page, I have successfully queried the database and output data to the page using fetchAssoc(), however this only returns the first row in the database. I would like to return all rows into an array for processing, so I'm attempting to use fetchAllAssoc(), this however results in an exception. The database has the following SQL fields:
id, model, manufacturer, url, date_modified
My test code is as follows:
<?php
db_set_active('product_db');
$query = db_select('product', 'p')->fields('p');
$sqlresults = $query->execute()->fetchAllAssoc('id');
foreach($sqlresults as $sqlresult)
{
printf($sqlresult);
}
db_set_active();
?>
I'm thinking that it is the key field 'id' that I am specifying with fetchAllAssoc() that is the problem, as fetchAssoc() prints values correctly. All documentation I have found seems to say that you pass a database field as the key but I have also passed a numeric value with no success.
Many thanks in advance for any advice, I'm sure I'm just missing something stupid.
I think it should work in this way, but within the foreach you want to print the $sqlresult variable as a string, but it is an object (it causes the error).
printf function needs a string as the first parameter, see:
http://php.net/manual/en/function.printf.php
Use for instance var_dump instead:
var_dump($sqlresult);
Related
I have a custom table in my wordpress install, and I want to get an average out of a column on the table. I'm using the following PHP:
$latavg = $wpdb->get_results("SELECT AVG(stop_lat) FROM stops_txt");
However, when I want to use the average later on as a string, it returns as 'ARRAY', yet attempting to use PRINT_R to view the array reveals nothing. The Column in the table is a DECIMAL data-type, what am I missing?
When you just want a single variable instead of a whole row or column in wpdb, use get_var() instead:
$latavg = $wpdb->get_var("SELECT AVG(stop_lat) FROM stops_txt");
Here is the complete wpdb reference.
I am creating the first of many sql statements to interact with a custom built database in wordpress and am falling at the first hurdle! To test that the php is working, I am entering a simple (I thought) statement and the result I am getting is [Array] but it should be returning a string (the username).
I see that some other posts say that I should be using print_r but the answer should not be an array. I have checked the syntax through phpmyadmin and it returns a name - as I believe it should..
<?php
global $wpdb;
$results = $wpdb->get_results( 'SELECT user_login FROM wpvh_users WHERE id = 2');
echo $results;
?>
all help really appreciated!
The function get_results returns an array, containing one entry.
Therefore you have to select the first element of that entry and display it :
echo $results[0]['user_login'];
Im a bit new to the php side of parse, mainly objective-c and swift but I need to write some code that I can query a column (not the objectID one) to return the results..
The column I'm trying to query is a pointer to another class.
Here is the very basic code I have which returns all the rows in the class and the pointers data with the include key, but I need to filter or get only the row/s that I'm looking for.
$query = new ParseQuery("ClassB");
$query->includeKey("ClassA");
$results = $query->find();
In the php sdk I see an option to use equalTo which has a key and a value to it so I tried the following code.
so I choose the column that was the pointer , and its objectid to hopefully only return those row/s that has that object id.
$query = new ParseQuery("ClassB");
$query->includeKey("ClassA");
$query->equalTo("ColumnNameX", "yjdyaGRWP7");
$results = $query->find();
Nothing was returned and a php error was spit out
'pointer field ColumnNameX needs a pointer value' in /var/www/parse/src/Parse/ParseClient.php:326
So im not 100% sure why I cant filter by a ColumnNameX using its objectID which is a pointer to ClassA..
Did I miss something in the PHP docs..
I mean ideally in mysql to just get that row I want would be
SELECT * FROM ClassB WHERE ColunNameX = yjdyaGRWP7
That would return me the row of data, I can use a Join of course to get some info from ClassA as well.
Any thoughts on what im missing or do I need to first query the Class A to get a pointer, then in the equalTo do something like ("ColumnNamX" , $pointerfromClassA) ?
any one have anyone point out what im missing or have a code example.. I have seen some that use the objectID but I dont have access to that.
Ok I figured out one way to do this, not sure if this is the right way but it returns now what I want..
$query->equalTo("ColunNameX", array("__type" => "Pointer", "className" => "ColunNameX", "objectId" => "yjdyaGRWP7"));
I've read through PHP PDO Book and now have some basic questions:
If i understood correctly, i'll have to use begin_transaction() in order to turn off autocommit. If i am okay with autocommit, i am always good to go with a simple query()Is this correct?
Did i get it right, that there is basically no difference between query() and exec(), except of the above asked topic?
I made a query like this one:
foreach ($db->query('SELECT * from user') as $row) {
$row = json_encode($row);
echo $row;
}
Which returns a JSON Object:
{
"alias":"tk",
"0":"tk",
"password":"pw",
"1":"pw",
}
This is basically correct, however, why is each value returned twice, once with my chosen keyword and another time with an Integer key?
why is each value returned twice, once with my chosen keyword and another time with an Integer key?
The array has the values both with the column names as keys, and the column ordinals too. So you could access the values from the result set by using the number of which column you want. (of course, that does not seem to be of too much use with a select * statement...)
You can affect this behaviour with PDOStatement::setFetchMode(). The constants starting with PDO::FETCH_ are applicable here. Their documentation can be found here
I am using a classified scripts and saves user_meta data in the wp_usermeta table.
The meta_key field is called user_address_info and in it there are all the data like below :
s:204:"a:7:{s:9:"user_add1";s:10:"my address";s:9:"user_add2";N;s:9:"user_city";s:7:"my city";s:10:"user_state";s:8:"my phone";s:12:"user_country";N;s:15:"user_postalcode";s:10:"comp phone";s:10:"user_phone";N;}";
I am not using all the fields on the script but user_add1, user_city, user_state and user_postalcode
I am having trouble to get the data using SQL like the example below (wordpress) :
$mylink = $wpdb->get_row("SELECT * FROM $wpdb->links WHERE link_id = 10", ARRAY_A);
I would like some help here so that I will display anywhere (I dont mind using any kind of SQL queries) the requested info e.g. the user_city of current author ID (e.g. 25)
I was given the following example but I want something dynamic
<?php
$s = 's:204:"a:7:{s:9:"user_add1";s:10:"my address";s:9:"user_add2";N;s:9:"user_city";s:7:"my city";s:10:"user_state";s:8:"my phone";s:12:"user_country";N;s:15:"user_postalcode";s:10:"comp phone";s:10:"user_phone";N;}"';
$u = unserialize($s);
$u2 = unserialize($u);
foreach ($u2 as $key => $value) {
echo "<br />$key == $value";
}
?>
Thank you very much.
No, you can't use SQL to unserialize.
That's why storing serialized data in a database is a very bad idea
And twice as bad is doing serialize twice.
So, you've got nothing but use the code you've given.
I see not much static in it though.
do you experience any certain problem with it?
Or you just want to fix something but don't know what something to fix? Get rid of serialization then
i have found that the serialize value stored to database is converted to some other way format. Since the serialize data store quotes marks, semicolon, culry bracket, the mysql need to be save on its own, So it automatically putting "backslash()" that comes from gpc_magic_quotes (CMIIW). So if you store a serialize data and you wanted to used it, in the interface you should used html_entity_decode() to make sure you have the actual format read by PHP.
here was my sample:
$ser = $data->serialization; // assume it is the serialization data from database
$arr_ser = unserialize(html_entity_decode($ser));
nb : i've try it and it works and be sure avoid this type to be stored in tables (to risky). this way can solve the json format stored in table too.