I have a user table that contain a lots more data, I wonder how can I improve my select code below
if ($result = $db->query("SELECT * FROM user ")) {
while ($row = mysqli_fetch_assoc($result)) {
echo $row["name"] . "<br />";
echo $row["user_id"] . "<br />";
echo $row["photo"] . "<br />";
//.. a lot more column here
}
}
I use this as a array: $user_info = mysql_fetch_assoc(mysql_query("SELECT * FROM `database` WHERE 1));
and to call it i use $user_info['column']
Related
I am having trouble echoing row data within the page I want to print it out to.
My function works, but only echoes the information because it is local (within the same function).
I'm trying to get this function to echo the database's information to another .php file (same program).
public function findByUsername($username) {
$sql = 'SELECT * FROM events WHERE username=? ';
$statement = DatabaseHelper::runQuery($this->connection, $sql, Array($username));
while ($row = $statement->fetch()) {
echo $row['username'] . "<br />";
echo $row['date'] . "<br />";
}
}
Here is the part of the other file I need to print the information from the function to:
<?php
if (isset($_SESSION["username"])) {
$eventDAO = new EventDAO($connection);
$event = $eventDAO->findByUsername($_SESSION["username"]);
foreach((array)$event as $e) {
echo $e->getUsername() . ' ' . $e->getDate() . '<br>';
}
}
?>
I'm trying to output the username/date.
Not 100% on this concept.
If you're simply trying to output username/date from one file to another, try using sessions.
public function findByUsername($username) {
$sql = 'SELECT * FROM events WHERE username=? ';
$statement = DatabaseHelper::runQuery($this->connection, $sql, Array($username));
while ($row = $statement->fetch()) {
echo $row['username'] . "<br />";
echo $row['date'] . "<br />";
$_SESSION['getuname'] = $row['username'];
$_SESSION['getdate'] = $row['date'];
}
}
You can then output the information on another php file simply by echoing it out.
echo "Username is ". $_SESSION['getuname'];
This is my array:
When I used mysqli_query in a different script, this style worked:
while ($printTest = mysqli_fetch_array($results)) {
echo $printTest['id'] . "<br />";
echo $printTest['questions'] . "<br />";
echo $printTest['answers'] . "<br />";
}
I can't figure out how to do the same thing with a PDO created array. With PDO, I can use foreach, like this:
foreach ($queryRows as $test=>questions){
echo $test;
}
Unfortunately, that doesn't give me access to id and answers in the same loop - which is important to me.
This is how I'm getting my PDO-generated array, currently:
$queryRows = $this->dbh->query("SELECT id, questions, answers FROM qarows WHERE usr = '$this->username'");
$queryRows = $queryRows->fetchAll(PDO::FETCH_ASSOC);
How do I access all 3 columns of my array, in a loop?
It's still the same fetch rows from db. Its still the same multi dimensional structure:
$select = $this->dbh->prepare('SELECT id, questions, answers FROM qarows WHERE usr = :usr');
$select->bindParam(':usr', $this->username);
$select->execute();
$queryRows = $select->fetchAll(PDO::FETCH_ASSOC);
foreach ($queryRows as $questions){
echo $questions['id'] . '<br/>';
}
Or the look a like mysqli:
$select = $this->dbh->prepare('SELECT id, questions, answers FROM qarows WHERE usr = :usr');
$select->bindParam(':usr', $this->username);
$select->execute();
while($printTest = $select->fetch(PDO::FETCH_ASSOC)) {
echo $printTest['id'] . "<br />";
echo $printTest['questions'] . "<br />";
echo $printTest['answers'] . "<br />";
}
im having some problem here. basically, i want to compare columns. so i fetched object and the comparing results appeared just as expected. however, it does not return the compare value anymore after i added the fetch_array to view the current table hoping that the compare value would appear beside the compare value. is there any way i could run the compare code and make it appear the table? i tried a query but it would only work in MySQL and not PHP.
$query = "SELECT * FROM system_audit"; $result = mysql_query($query) or die(mysql_error());
echo " ID Type Setting Value ";
while($row = mysql_fetch_array($result)) {
echo $row['ID'];
echo $row['Type'];
echo $row['Setting'];
echo $row['Value'];
}
while ($row = mysql_fetch_object($result)) {
if($row->Setting != $row->Value) {
echo "X";
} else {
echo "O";
}
}
Your code contains a lot of echo's that have no use. I would suggest learning PHP a bit more.
Your compare is wrong, this should work :
$query = "SELECT * FROM system_audit";
$result = mysql_query($query) or die(mysql_error());
echo " ID Type Setting Value ";
while($row = mysql_fetch_array($result)) {
echo $row['ID'] . "<br>";
echo $row['Type'] . "<br>";
echo $row['Setting'] . "<br>";
echo $row['Value'] . "<br>";
if($row['Setting'] != $row['Value']) {
echo "X" . "<br>";
}
else {
echo "O" . "<br>";
}
echo "<br>";
Below is a function in PHP I created which returns some product information in an array. On the web page where I am calling this function I want to be able to specify exact array elements for example just the product description ($result2['itm_desc']). Please can someone point me in the right direction as to do this. I would assume you call a function like fetch array but i'm not quite sure how to execute this.
public function getAllReelImages(){
$sql = "SELECT id FROM $this->table3 WHERE itm_cat = 2 ORDER BY id ASC";
echo "<br /><br />";
$stmt = mysqli_query($this->connection, $sql);
/*fetch values*/
while($result = mysqli_fetch_array($stmt)){
echo "<br /><br />";
$sql2 = "SELECT itm_details.id,itm_details.itm_make,itm_details.itm_model,itm_details.itm_desc,itm_pic_detail.itm_pic_name, itm_value.itm_sale_price
FROM
itm_details, itm_pic_detail, itm_value
WHERE
itm_details.id = {$result['id']} AND itm_pic_detail.id = {$result['id']}
AND itm_value.id = {$result['id']} ORDER BY id ASC";
$stmt2 = mysqli_query($this->connection, $sql2);
while($result2 = $stmt2->fetch_array()){
echo ($result2['id']); echo"<br />";
echo ($result2['itm_make']); echo"<br />";
echo ($result2['itm_model']); echo"<br />";
echo ($result2['itm_desc']); echo"<br />";
echo ($result2['itm_sale_price']); echo"<br />";
echo "<img src='$this->dir"."{$result2['itm_pic_name']}'><br />";
echo"<br />";
echo $value;
}
}
}
First of all.. Your code is pretty bad. I made it little bit more clear. For example: echo ($result2['id']); echo"<br />"; TO-> echo $result2['id'] . '<br />'; (for future references.)
They way your code is at the moment. You wont add anything to an array, since you echo them right away. I made my version, that would first create the array and then later you can use that array..in any way you want :)
And doesn't the ORDER BY use by default as ASC?
I also changed the first query more dynamic.
NOTE: I'm not very good with mysql table joining, somebody must validate the second query. But in my eyes, its absolutely incorrect. However, I'm posting this in the reference for creating an array with a function and then displaying it.
NOTE2: I hope your question was about PHP o.0
# This should be in some class ?!
function getAllReelImages ($category) {
$sql = "SELECT * FROM `" . $this->table3 . "` WHERE `itm_cat` = '" . $category . "' ORDER BY `id` ASC";
$stmt = mysqli_query($this->connection, $sql);
while($result = mysqli_fetch_array($stmt)) {
$sql2 = "SELECT `itm_details.id`, `itm_details.itm_make`, `itm_details.itm_model`, `itm_details.itm_desc`, `itm_pic_detail.itm_pic_name`, `itm_value.itm_sale_price` FROM `itm_details`, `itm_pic_detail`, `itm_value` WHERE `itm_details.id` = '" . $result['id'] . "' AND `itm_pic_detail.id` = '" . $result['id'] . "' AND `itm_value.id` = '" . $result['id'] . "' ORDER BY `id` ASC";
$stmt2 = mysqli_query($this->connection, $sql2);
while($result2 = $stmt2->fetch_array()){
$returns[$result2['id']]['id'] = $result2['id'];
$returns[$result2['id']]['itm_make'] = $result2['itm_make'];
$returns[$result2['id']]['itm_model'] = $result2['itm_model'];
$returns[$result2['id']]['itm_desc'] = $result2['itm_desc'];
$returns[$result2['id']]['itm_sale_price'] = $result2['itm_sale_price'];
$returns[$result2['id']]['itm_pic_name'] = $this->dir . $result2['itm_pic_name'];
}
}
return $returns;
}
# Display the results:
echo '<br /><br />';
foreach (getAllReelImages(2) as $img_id => $img_value) {
echo $img_id . '<br>';
echo $img_value['itm_make'] . '<br>';
echo $img_value['itm_model'] . '<br>';
echo $img_value['itm_desc'] . '<br>';
echo $img_value['itm_sale_price'] . '<br>';
echo $img_value['itm_pic_name'] . '<br>';
echo '<hr>';
}
echo '<br />';
Here is the code I input...
mysql_query("INSERT INTO test (string) VALUES ('tes><ssst')");
And this is how I query the result out:
$result = mysql_query("SELECT * FROM test");
while($row = mysql_fetch_array($result))
{
echo $row['id'] . " ---- " . $row['string'];
echo "<br />";
}
but I only get this result:
3 ---- tes>
I miss the missing part: "<ssst", but when I go to the db, I can retrieve the string I inserted. What's happen? Thank you.
That's because your browser thinks <ssst is an html tag. You should encode your output
while($row = mysql_fetch_array($result)) {
echo $row['id'] . " ---- " . htmlspecialchars($row['string']);
echo "<br />";
}
use htmlspecialchars to encode output