I have a postgres table with four columns labelled dstart which is date data type,
dend which is also a date data type, dcontract which is a date data type and id which is a integer. I am trying to run a php code to get the data using an array and use it in the body of my application. But when I test the array and try to echo some values... My browser just displays the word array... Is there anyway I can be able to retrieve the data or fix this code? Please see code below
<?php
function getLiveDate($campid)
{
global $conn,$agencies;
$return=array(
'livedate'=>'',
'campid'=>'',
'enddate'=>'',
'dateContract'=>'',
);
$sql = "SELECT id, dcontract, dstart, dend
FROM campaigns
WHERE id = '".$campid."' ORDER BY dstart DESC LIMIT 1";
$r = pg_query($conn,$sql);
if ($r)
{
$d = pg_fetch_array($r);
if (!empty($d))
{
$return['livedate'] = $d['dstart'];
$return['campid'] = $d['id'];
$return['enddate'] = $d['dend'];
$return['dateContract'] = $d['dcontract'];
}
}
#pg_free_result($r);
return $return;
}
I am pretty sure, your array $d is "multi-dimensional" and pg_fetch_array() returns an array of arrays, because the result of SQL queries in general may contain multiple rows. You limited it to one row, but you certainly get the correct values by assinging $return['livedata'] = $d[0]['dstart']; or $return['livedata'] = $d['dstart'][0]; and so on (I am not familiar with that particularly function for I usually use MySQL instead of Postgre).
Besides, try echoing your data by means of print_r() instead of echo.
The $return variable is an array, if you want shows the content, you must use print_r or var_dump not echo.
Related
The intention with the below code is to extract messages from a mysql table, and put each of them inside ONE array with {} around each output. Each output consists of various parameters as you can see, and is an array in itself.
What the code does is that each time the loop is processed, in the JSON array that this later is converted into, it wraps the output in []´s, hence it´s now a new array which is created.
What I get is:
[{"sender":"ll","message":"blah","timestamp":"2016-12-21 14:43:04","username":"","msgtype":"","threadid":"32629016712222016034323"},{"sender":"kk","message":"blahblah","timestamp":"2016-12-21 14:43:23","username":"","msgtype":"","threadid":"32629016712222016034323"},{"sender":"ll","message":"blahblahblah","timestamp":"2016-12-21 14:43:47","username":"","msgtype":"","threadid":"32629016712222016034323"}],[{"sender":"ll","message":"blahblahblahblah","timestamp":"2016-12-21 14:43:04","username":"","msgtype":"","threadid":"92337321312222016034304"},{"sender":"kk","message":"blahblahblahblahblah","timestamp":"2016-12-21 14:44:05","username":"","msgtype":"","threadid":"92337321312222016034304"}]]
And what I want is:
[{"sender":"ll","message":"blah","timestamp":"2016-12-21 14:43:04","username":"","msgtype":"","threadid":"32629016712222016034323"},{"sender":"kk","message":"blahblah","timestamp":"2016-12-21 14:43:23","username":"","msgtype":"","threadid":"32629016712222016034323"},{"sender":"ll","message":"blahblahblah","timestamp":"2016-12-21 14:43:47","username":"","msgtype":"","threadid":"32629016712222016034323"}],{"sender":"ll","message":"blahblahblahblah","timestamp":"2016-12-21 14:43:04","username":"","msgtype":"","threadid":"92337321312222016034304"},{"sender":"kk","message":"blahblahblahblahblah","timestamp":"2016-12-21 14:44:05","username":"","msgtype":"","threadid":"92337321312222016034304"}]
How do I proceed to get the right result here?
$data = array ();
foreach($threads as $threadid){
$sql = ("SELECT sender,message,timestamp,username,msgtype,threadid FROM Messages WHERE threadid = '$threadid' AND subject = '' AND timestamp > '$newtimestamp' ORDER BY timestamp");
$arrayOfObjects = $conn->query($sql)->fetchAll(PDO::FETCH_OBJ);
$data[] = $$arrayOfObjects;
}
And FYI, $threadid is another array containing... threadids, and the loop correctly fetches these one by one, that´s not where the problem is.
Thanks in advance!!
You are doing O(N) database queries, consider doing just O(1) using an IN expression in your where clause. No need for a foreach loop and you'll get all your data in one array.
SELECT ... FROM Messages WHERE threadid IN (1, 2, 3, ...) AND ...
You might have to use a prepared statement for that.
I think you are searching for PDO::FETCH_OBJ.
You had FETCH_ASSOC, which will return an array of associative arrays.
FETCH_OBJwill return an array ob stdObjects.
Also you reassigned $array to itself when doing $array[] = $array;..
$data = array();
foreach($threads as $threadid){
$sql = ("SELECT sender,message,timestamp,username,msgtype,threadid FROM Messages WHERE threadid = '$threadid' AND subject = '' AND timestamp > '$newtimestamp' ORDER BY timestamp");
// here it is:
$arrayOfObjects = $conn->query($sql)->fetchAll(PDO::FETCH_OBJ);
$data[] = $arrayOfObjects;
}
// now you can encode that as json and show it:
echo json_encode($data);
#akuhn
Well, I decided to give your suggestion one more try, and managed to do it in a none prepared way. I´m aware that this is supposed to be risky, but so far this project just needs to work, then have the php codes updated to safer versions, and then go live. It works, so thanks a bunch!
$sql = ("SELECT sender,message,timestamp,username,msgtype,threadid FROM Messages WHERE threadid IN ('" . implode("','",$threadid) . "') AND subject = '' AND timestamp > '$newtimestamp' ORDER BY timestamp");
$data = $conn->query($sql)->fetchAll(PDO::FETCH_OBJ);
I have a file file.php and inside my file I am using the code bellow to pull some data from my database and display some information.
My code is
$array = $_GET['theurl']; // My url looks like myfile.php?theurl=1,2,3 (id,s)
$sqlnt4 = "select * from mytable WHERE `id` IN ($array)";
$rsdt4 = mysql_query($sql);
$tc4a = mysql_fetch_assoc($rsdt4);
$mycomma4 = ",";
if ($tc4a['a_youtube'] == "#"){
}else{
while ($tc4 = mysql_fetch_assoc($rsdt4))
{
echo $tc4['a_youtube'];
echo ",";
}
}
I expect to echo the infos of the two id's (in array) inside my while function, but it returns the results only from the first.
Any ideas?
I am confusing on $sql :
$sqlnt4 = "select * from mytable WHERE `id` IN ($array)";
$rsdt4 = mysql_query($sql);
Can you take a look after changing below:
$sqlnt4 = "select * from mytable WHERE `id` IN ($array)";
$rsdt4 = mysql_query($sqlnt4);
First that's extremely vulnerable to security issues - I hope this isn't used in production and just for playing around.
I recommend switching to PDO, or at the very least securing your variables.
To put that array into the query, you need to implode it into a list, as such.
$list = implode(',', $array);
You can then use the list in the statement, which will look like 1,2,3.
Edit:
I've just realized your $array value isn't actually an array - have you missed code out or is it badly named?
mysql_fetch_assoc: "Returns an associative array that corresponds to the fetched row and moves the internal data pointer ahead." http://pt2.php.net/mysql_fetch_assoc
Try mysql_fetch_rows to return all matching rows into an array.
hello i want to create function with returning data, for example when i have the function advert i want to make it every time show what i need, i have the table id, sub_id, name, date, and i want to create the function that i can print every time what i need advert(id), advert(name), i want to make it to show every time what i need exactly and i want to save all my result in array, and every time grab the exactly row that i want
<?php
function advert($data){
$id = $_GET['id'];
$query = mysql_query("SELECT *FROM advertisement WHERE id = $id");
while($row = mysql_fetch_assoc($query)){
$data = array(
'id' => $row['id']
);
}
return $data;
}
echo advert($data['id']);
?>
but my result every time is empty, can you help me please?
There are so many flaws in this short piece of code that the only good advice would be to get some beginners tutorial. But i'll put some effort into explaining a few things. Hopefully it will help.
First step would be the line function advert($data), you are passing a parameter $data to the method. Now later on you are using the same variable $data in the return field. I guess that you attempted to let the function know what variable you wanted to fill, but that is not needed.
If I understand correctly what you are trying to do, I would pass in the $id parameter. Then you can use this function to get the array based on the ID you supplied and it doesnt always have to come from the querystring (although it could).
function advert($id) {
}
Now we have the basics setup, we want to get the information from the database. Your code would work, but it is also vulnerable for SQL injection. Since thats a topic on its own, I suggest you use google to find information on the subject. For now I'll just say that you need to verify user input. In this case you want an ID, which I assume is numeric, so make sure its numeric. I'll also asume you have an integer ID, so that would make.
function advert($id) {
if (!is_int($id))
return "possible SQL injection.";
}
Then I'll make another assumption, and that is that the ID is unique and that you only expect 1 result to be returned. Because there is only one result, we can use the LIMIT option in the query and dont need the while loop.
Also keep in mind that mysql_ functions are deprecated and should no longer be used. Try to switch to mysqli or PDO. But for now, i'll just use your code.
Adding just the ID to the $data array seems useless, but I guess you understand how to add the other columns from the SQL table.
function advert($id) {
if (!is_int($id))
return "possible SQL injection.";
$query = mysql_query("SELECT * FROM advertisement WHERE id = $id LIMIT 1");
$row = mysql_fetch_assoc($query);
$data = array(
'id' => $row['id']
);
return $data;
}
Not to call this method we can use the GET parameter like so. Please be advised that echoing an array will most likely not give you the desired result. I would store the result in a variable and then continue using it.
$ad = advert($_GET['id']);
if (!is_array($ad)) {
echo $ad; //for sql injection message
} else {
print_r($ad) //to show array content
}
Do you want to show the specific column value in the return result , like if you pass as as Id , you want to return only Id column data.
Loop through all the key of the row array and on matching with the incoming Column name you can get the value and break the loop.
Check this link : php & mysql - loop through columns of a single row and passing values into array
You are already passing ID as function argument. Also put space between * and FROM.
So use it as below.
$query = mysql_query("SELECT * FROM advertisement WHERE id = '".$data."'");
OR
function advert($id)
{
$query = mysql_query("SELECT * FROM advertisement WHERE id = '".$id."'");
$data = array();
while($row = mysql_fetch_assoc($query))
{
$data[] = $row;
}
return $data;
}
Do not use mysql_* as that is deprecated instead use PDO or MYSQLI_*
try this:
<?php
function advert($id){
$data= array();
//$id = $_GET['id'];
$query = mysql_query("SELECT *FROM advertisement WHERE id = $id");
while($row = mysql_fetch_assoc($query)){
array_push($data,$row['id']);
}
return $data;
}
var_dump($data);
//echo advert($data['id']);
?>
i have function which is something like this
function multiple_delete($entity1,$entity2,$entity2) {
$query = "SELECT * FROM tablename WHERE id = '4' ";
$result = mysql_query($query);
$row = mysql_fetch_array($result);
echo $entity1;
echo $entity2;
echo $entity3;
}
and my function call is
multiple_delete('$row[\'pic_title\']', '$row[\'pic_brief\']', '$row[\'pic_detail\']');
keeping in mind the three value which i am passing through the parameter is the entity name of particular table.
now this function will print it as the string i.e ($row['pic_title'], $row['pic_brief']', $row['pic_detail']) and hence not parse it as the value which i want it to do. if it parse it as the value then i will be able to get the records from the database. i have tried with the combination of single quotes, doubles, with concatenation operator etc. is there any way i tell the script that do not parse it as the string instead treat it as it have been declared to fetch the value from database. does php have any function for this ? or i am going wrong with the logic.
if i skip the parameters and declare in the functions something like this.
echo $row['pic_title'];
echo $row['pic_brief'];
echo $row['pic_detail'];
it works perfectly fine . why is that when i try to achieve the same thing with the help of parameter it refuses to fetch the value from the database, and instead it returns the same declared string from the function call.
Please do not tell me that i dont need that parameter, i need it because i want it to perform the dynamic data manipulation, with regard to different tables and different table entities. and the above function is just the demonstration of my problem not the exact function. if you want to have a look at the exact function you can check here.
What is wrong with my function?
thank you
Just pass the names of the columns:
multiple_delete('pic_title', 'pic_brief', 'pic_detail');
Then you can use them to access the corresponding values in the row array by using the names them as keys:
function multiple_delete($entity1, $entity2, $entity3) {
$query = "SELECT * FROM tablename WHERE id = '4' ";
$result = mysql_query($query);
$row = mysql_fetch_array($result);
echo $row[$entity1];
echo $row[$entity2];
echo $row[$entity3];
}
I have a table but I dont know what the columns are except for 1 column. There is only 1 permanent data value for each row, the rest of the columns are added and removed elsewhere. This isnt a problem for the query, i just do:
SELECT * FROM table
but for the php function bind_result() i need to give it variables for each column, which i do not know.
I think that once I have the columns in an array, I can do anther query and use call_user_func_array to bind the result to the array.
This seems like it would come up a lot so im wondering is there a standard way of doing this?
Couldn't you just do:
$result = mysql_query("SELECT * FROM table");
while ($row = mysql_fetch_assoc($result))
{
foreach ($row as $field => $value)
{
...
}
}
You could do
show columns from table;
And then parse that string to grab your column names.
You can also try the describe command, which is used to list all of the fields in a table and the data format of each field. Usage:
describe TableName;
you can use
$metadata = $prep_statement->result_metadata()
after you executed the statement and then loop through all result fields using something like
while( $field = $metadata->fetch_field() ) { }
the properties of $field are documented here: http://www.php.net/manual/en/mysqli-result.fetch-field.php