In the following example, can any folks show me how to code the binding part as I select all fields from the table
$stmt = $mysqli_conn->stmt_init();
if ($stmt->prepare("SELECT * FROM books")) {
$stmt->execute();
$stmt->bind_result( **WHAT DO I PUT HERE** );
$stmt->close();
}
In bind_result, you put in the variables where you want to fetch the data into, instead of using an array returned otherwise.
$stmt->bind_result($col1, $col2, $col3, $col4);
while($stmt->fetch_assoc())
echo "$col1 $col2 $col3 $col4";
Alternatively, if you don't want to bind the result
while($resultArray = $stmt->fetch_assoc()) {
echo "$resultArray[columnName1] $resultArray[columnName2] ...";
}
Related
I want to get sum of integers that are selected from mysql
Here is my code
<?php
Include 'init.php';
$page = '2459';
$ttl = array();
$search = $db->link->query("SELECT id,packid,rating FROM pakrate WHERE packid LIKE '%$q%'");
if($search->num_rows>0){
while($result=$search->fetch_assoc()){
$ttl[] = $row['rating'];
echo $ttl;
echo $result[SUM('rating')];
}
}
else {
echo "no such query";
}
So what I am doing wrong here, any other suggestions?
Just run the sum in your query
<?php
Include 'init.php';
$page = '2459';
$ttl = array();
// Not sure why you're doing this but there should only be one leading connection ($conn->query) unless you're doing some object item elsewhere in init.
// I would also use prepared statements since they're more secure:
$q = "%$q%"; // create your like variable, wherever $q is coming from??
$query = "SELECT sum(rating) from pakrate WHERE packid LIKE ?);
$stmt = $db->prepare($query); // assuming $db is your connection variable
if($stmt){
$stmt->bind_param("s",$q); // Bind the variable in
$stmt->execute(); // Execute
$stmt->bind_result($rating); // Bind the result variable
$stmt->store_result(); // Store it so you can get num_rows
$rows = $stmt->num_rows; // assign rows found
if($rows > 0){
while($stmt->fetch()){ // Loop the result
$ttl[] = $rating; // add to your array
// You can't echo an array like this.... echo $ttl;
// if you really want to, print_r($ttl);
}
}
$stmt->close(); // Close it
}
?>
I'm trying to use PDO using the following code, I want to select the array of values for the context_list, but it returns one record, any ideas where I'm going wrong?
try {
$sql2 = "SELECT area_easting, area_northing, context_number FROM excavation.contexts";
$sth = $conn->prepare($sql2);
$sth->execute();
while ($row = $sth->fetch(PDO::FETCH_ASSOC))
{
$easting_list = $row['area_easting'];
$northing_list = $row['area_northing'];
$context_list = $row['context_number'];
}
}
catch(PDOException $e )
{
echo "Error: ".$e;
}
echo "context list: ";
echo $context_list;
A partial solution:
This worked:
$query = $conn->prepare("SELECT area_easting, area_northing, context_number FROM excavation.contexts");
$query->execute();
while($r = $query->fetch(PDO::FETCH_OBJ)){
echo $r->area_easting, '|';
echo $r->area_northing;
echo '<br/>';
}
But Now I need to make the $r->area_easting accessible to the session, but that's another question.
Your query may return several records (provided they actually exist in the table).
Your code loops through all the records (with the while loop) but the values ($easting_list, $northing_list and $context_list) are overwritten in the loop.
I suggest the following changes to your code:
$easting_list = array();
$northing_list = array();
$context_list = array();
try {
$sql2 = "SELECT area_easting, area_northing, context_number FROM excavation.contexts";
$sth = $conn->prepare($sql2);
$sth->execute();
while ($row = $sth->fetch(PDO::FETCH_ASSOC))
{
$easting_list[] = $row['area_easting'];
$northing_list[] = $row['area_northing'];
$context_list[] = $row['context_number'];
}
}
catch(PDOException $e )
{
echo "Error: ".$e;
}
echo "context list: ";
echo implode(', ', $context_list);
Now all the values are stored in 3 arrays. explode is used to print a comma-separated list of all values in $context_list array.
In the below code,I can echo $count in bind_result by using while loop(commented in the code). But instead I want to keep that value in the $count variable for further processing instead of just printing the value. How do I hold the value for $count?
/*......mysqli connection...*/
$stmt =$mysqli->prepare("select count(*) from tab where rtd_id=? ");
$stmt->bind_param('i',$id);
$id = 1;
$stmt->execute();
$stmt->bind_result($count);
/*while($stmt->fetch())
{
echo $count;
}*/
if($count>0)
{
//DO SOMETHING
}
?>
First of all, you don't need a loop here.
$stmt->bind_result($count);
$stmt->fetch();
if($count>0)
{
//DO SOMETHING
}
I'm having an issue here. I am trying to pass a variable into a sqlplus query, and it does not seem to be working.
my $connect = DBI->connect('DBI:Oracle:',$dbuser,$dbpasswd);
my $query = "select sum(transaction_amnt) from comm_to_cand natural join cmte_id_to_geo where cycle='?'", $cycle;
my $query_handle = $connect->prepare($query);
$query_handle->execute();
$cmte_money = $query_handle->fetchrow_array();
print 'Money: ';
print $cmte_money;
if($cmte_money > 0)
{
print 'HI';
}
else
{
print 'NOOOO';
}
I can get the query to work when I change the "cycles" variable from a variable to a constant, and the if statement checking will print hi, so the databases work I'm positive.
I've scoured the internet, and I can't seem to find an answer.
First, you mean to use a placeholder but you don't.
where cycle='?' -- This is a string
should be
where cycle=? -- This is a placeholder
And then there's problem that you don't actually pass a value for the placeholder.
$query_handle->execute();
should be
$query_handle->execute($cycle);
The replacements for placeholders get passed to execute, so:
my $query = "select sum(transaction_amnt) from comm_to_cand natural join cmte_id_to_geo where cycle=?";
my $query_handle = $connect->prepare($query);
$query_handle->execute($cycle);
The code you had would have triggered warnings if you had them enabled; make sure you do and that you figure out how to respond to any you get.
Here is an example:
use strict;
use DBI;
my $connect = DBI->connect('DBI:Oracle:', $dbuser, $dbpasswd);
my $query = "select sum(transaction_amnt) from comm_to_cand natural join cmte_id_to_geo where cycle = `$cycle`";
my $query_handle = $connect->prepare($query);
$query_handle->execute();
#cmte_money = $query_handle->fetchrow_array();
print 'Money: ';
print #cmte_money;
if($#cmte_money >= 0)
{
print 'HI';
}
else
{
print 'NOOOO';
}
I define a constant variable $cycle, I think like this.
my $connect = DBI->connect('DBI:Oracle:',$dbuser,$dbpasswd);
# Tell the DBI that the query uses bind variable with ? (question mark)
my $query = "select sum(transaction_amnt) from comm_to_cand natural join cmte_id_to_geo where cycle=?";
my $query_handle = $connect->prepare($query);
# Pass the value
$query_handle->execute($cycle); # assuming the variable is defined (otherwise it will pass as NULL into the query)
$cmte_money = $query_handle->fetchrow_array();
print 'Money: ';
print $cmte_money;
if($cmte_money > 0)
{
print 'HI';
}
else
{
print 'NOOOO';
}
I've been banging my head over this issue for about 5 hours now, I'm really frustrated and need some assistance.
I'm writing a Perl script that pulls jobs out of a MySQL table and then preforms various database admin tasks. The current task is "creating databases". The script successfully creates the database(s), but when I got to generating the config file for PHP developers it blows up.
I believe it is an issue with referencing and dereferencing variables, but I'm not quite sure what exactly is happening. I think after this function call, something happens to
$$result{'databaseName'}. This is how I get result: $result = $select->fetchrow_hashref()
Here is my function call, and the function implementation:
Function call (line 127):
generateConfig($$result{'databaseName'}, $newPassword, "php");
Function implementation:
sub generateConfig {
my($inName) = $_[0];
my($inPass) = $_[1];
my($inExt) = $_[2];
my($goodData) = 1;
my($select) = $dbh->prepare("SELECT id FROM $databasesTableName WHERE name = '$inName'");
my($path) = $documentRoot.$inName."_config.".$inExt;
$select->execute();
if ($select->rows < 1 ) {
$goodData = 0;
}
while ( $result = $select->fetchrow_hashref() )
{
my($insert) = $dbh->do("INSERT INTO $configTableName(databaseId, username, password, path)".
"VALUES('$$result{'id'}', '$inName', '$inPass', '$path')");
}
return 1;
}
Errors:
Use of uninitialized value in concatenation (.) or string at ./dbcreator.pl line 142.
Use of uninitialized value in concatenation (.) or string at ./dbcreator.pl line 154.
Line 142:
$update = $dbh->do("UPDATE ${tablename}
SET ${jobStatus}='${newStatus}'
WHERE id = '$$result{'id'}'");
Line 154:
print "Successfully created $$result{'databaseName'}\n";
The reason I think the problem comes from the function call is because if I comment out the function call, everything works great!
If anyone could help me understand what's going on, that would be great.
Thanks,
p.s. If you notice a security issue with the whole storing passwords as plain text in a database, that's going to be addressed after this is working correctly. =P
Dylan
You do not want to store a reference to the $result returned from fetchrow_hashref, as each subsequent call will overwrite that reference.
That's ok, you're not using the reference when you are calling generate_config, as you are passing data in by value.
Are you using the same $result variable in generate_config and in the calling function? You should be using your own 'my $result' in generate_config.
while ( my $result = $select->fetchrow_hashref() )
# ^^ #add my
That's all that can be said with the current snippets of code you've included.
Some cleanup:
When calling generate_config you are passing by value, not by reference. This is fine.
you are getting an undef warning, this means you are running with 'use strict;'. Good!
create lexical $result within the function, via my.
While $$hashr{key} is valid code, $hashr->{key} is preferred.
you're using dbh->prepare, might as well use placeholders.
sub generateConfig {
my($inName, inPass, $inExt) = #_;
my $goodData = 1;
my $select = $dbh->prepare("SELECT id FROM $databasesTableName WHERE name = ?");
my $insert = $dbh->prepare("
INSERT INTO $configTableName(
databaseID
,username
,password
,path)
VALUES( ?, ?, ?, ?)" );
my $path = $documentRoot . $inName . "_config." . $inExt;
$select->execute( $inName );
if ($select->rows < 1 ) {
$goodData = 0;
}
while ( my $result = $select->fetchrow_hashref() )
{
insert->execute( $result->{id}, $inName, $inPass, $path );
}
return 1;
}
EDIT: after reading your comment
I think that both errors have to do with your using $$result. If $result is the return value of fetchrow_hashref, like in:
$result = $select->fetchrow_hashref()
then the correct way to refer to its values should be:
print "Successfully created " . $result{'databaseName'} . "\n";
and:
$update = $dbh->do("UPDATE ${tablename}
SET ${jobStatus}='${newStatus}'
WHERE id = '$result{'id'}'");
OLD ANSWER:
In function generateConfig, you can pass a reference in using this syntax:
generateConfig(\$result{'databaseName'},$newPassword, "php");
($$ is used to dereference a reference to a string; \ gives you a reference to the object it is applied to).
Then, in the print statement itself, I would try:
print "Successfully created $result->{'databaseName'}->{columnName}\n";
indeed, fetchrow_hashref returns a hash (not a string).
This should fix one problem.
Furthermore, you are using the variable named $dbh but you don't show where it is set. Is it a global variable so that you can use it in generateConfig? Has it been initialized when generateConfig is executed?
This was driving me crazy when I was running hetchrow_hashref from Oracle result set.
Turened out the column names are always returned in upper case.
So once I started referencing the colum in upper case, problem went away:
insert->execute( $result->{ID}, $inName, $inPass, $path );