I have a query:
"SELECT Time, Date, Name, Email FROM table"
It converts the results to json to be passed via ajax, the problem is I want a new column in the sql, so I add it to the query:
"SELECT Time, Date, Name, Email, Address FROM table"
now the json encode does not work, I have tried changing data types and using UTF-8 however this did not work, none of the others are using UTF-8 but still work anyway, Thanks.
This is my code to encode to json which does work until I add the new collumn from sql
if ($result = $mysqli->query($query)) {
$tempArray = array();
while($row = $result->fetch_object()) {
$tempArray = $row;
array_push($myArray, $tempArray);
}
echo json_encode($myArray);
}
Solved
The problem was the last column i was trying to get was called "Show" for some reason sql does not like this, i renamed this column to "lol" (temporary) and it works!
Related
i have question i don't know better approach to do it in mysql. I have a table in mysql with list of regex's each regex represent a company order number
i want to be able to compare a number to that list to get which company this number belongs to. the lazy way is to list all the regex in php and then using loop to get the company , but i want to do this using the power of mysql .
Like #Mech mention this might be vague.
i will try to explain it more :
I have two tables table with actual regex pattern in plain text in a column like "^[8]{1}[0-9]{10}$"
and this pattern belong to a company , there is more than 500 regex patterns .
Thank you.
Here you go #BM2ilabs. A function as requested :)
carrierID(88888141234);
function carrierID($ordernum) {
// create a connection to your db here
// fetch data needed for loop
$sql = "SELECT regex, carrier_id FROM `company_tbl_from_image`";
// fetch results
$results = $conn->query($sql);
// loop through $results
foreach ($results as $result) {
// individually check against each regex in the table
$regex = $result[regex];
// find first instance of $regex, where the $ordernum is unique, there should only be one match
if (preg_match('/'.$regex.'/', $ordernum)) {
$carrier_id = $result[carrier_id];
break; // remove break to show other matches
}
}
// check if $carrier_id is empty
if ($carrier_id <> "") {
echo $carrier_id;
} else {
echo "No carrier ID found.";
}
}
MySQL only option. Just search this:
SELECT carrier_id FROM `company_tbl_from_image` WHERE 'order number' REGEXP regex
I have found out how to make a page for WordPress, where I can write PHP code into.
However, I can not figure out how to retrieve content from another database.
I have found the connect code:
$wpdb2 = new wpdb($dbname, $dbpass, $dbuname, $dbhost);
but I cannot figure out how to retrieve content from the database.
Can someone give an example?
If, for example, have this query
SELECT number
FROM qr_statistic
WHERE date = '$today'
please see this:
wpdb::get_results( string $query = null, string $output = OBJECT )
now you can write your query:
$result = $wpdb->get_results("SELECT number FROM $wpdb->qr_statistic WHERE WHERE date = '$today'");
also see this link
I am trying to send city from a page to another and then show items from database where city is the mentioned city but this code does not return any results. Please guide. I am sure everything else is fine with the code.
$city = $_POST["city"];
$sql = "SELECT id,full_name, email, password,full_address,city,age,contact_number,gender,education FROM users WHERE city=$city";
// strip tags from the input
$city = strip_tags($_POST["city"]);
// escape the input to prevent sql injection (assuming you are using mysqli() as your connection method...)
$city = mysqli_real_escape_string($city);
// your query does not work because you need to put strings inside single quotes
$sql = "SELECT id,full_name, email, password,full_address,city,age,contact_number,gender,education FROM users WHERE city='$city'";
Actually, you're not even executing the request on your mysql server, but if you are using PDO (what you SHOULD do), just do something like this:
<?php
$bdd = new PDO(etc);
$req = $bdd->prepare("SELECT id,full_name, email, password,full_address,city,age,contact_number,gender,education FROM users WHERE city=?");
$req->execute(array($_POST['city']));
print_r($req->fetchAll());
?>
And here you go, $req->fetchAll() will return you an array with each element returned by your request, and the best part is that prepare will prevent you from every SQLi
Edit: You can use short syntax for array [$_POST['city']] or old and complete syntax: array($_POST['city'])
User Form Input - City
User Form Input - Venue
User Form Input - Cover
User Form Input - Time
User Form Input - Date
User Form Input - Number1
User Form Input - Number2
(if any are blank they are coverted to '*' on the way in. But could be whatever works.)
my $grabgig = $hookup->prepare(qq{SELECT `VenueNumber`,`Venue`,`CoverCharge`,`SetLength`,`City`,`Owner`,`Date`,`Time`,`Image1`,`Number`
FROM `gigs`
WHERE VenueNumber > ? AND `City` = ? AND `Venue` = ? AND `CoverCharge` = ?
AND Date = ? AND `Number` > ? AND `Number` < ?
AND `Time` LIKE ? LIMIT ?,?});
##########################################
$grabgig->execute('100',$city,$venue,$cover,'*',$number1,$number2,?,'0','6')
or die "Did not execute";
That is a basic example above.
I want to be able to return results based on the City Input.
If more input is present, then narrow down results accordingly.
But the query returns nothing if fields are empty (*).
I tried wildcards and so on then, I experimented with LIKE and NOT LIKE.
This seemingly simple search is driving me nuts.
Can someone help this newbie?
OK, I'm pretty unsure what you mean, BUT, my best undererstanding of what you're trying to do is to query like you do now BUT if a particular field is not populated in the form, to avoid adding that field to the where clause; as opposed to current query which instead does and myField="*".
Correct?
If that's so, you need to build your query, and replacement list, in pieces:
my $sql = qq{SELECT MY_FIELD_LIST_TOO_LAZY_TO_TYPE FROM `gigs` WHERE 2=2};
my #replacement_values = (); # These go into execute() instead of "?"s
if ($city ne "*") {
$sql .= qq[AND city = ?];
push #replacement_values, $city;
}
if ($number1 ne "*") {
$sql .= qq[AND number > ?];
push #replacement_values, $number1;
}
# ... more values processed the same way
my $grabgig = $hookup->prepare($sql);
$grabgig->execute(#replacement_values) or die "Did not execute";
If you want to do it more intelligently (i.e. to generalize), you will have the form fields in a hash; have a config hash mapping the form field name to the DB column name and the operator, and instead do the above as:
my %fields = (
city => ["city" , "="]
,number1 => ["number", ">"]
,number2 => ["number", "<"]
);
my $sql = qq{SELECT MY_FIELD_LIST_TOO_LAZY_TO_TYPE FROM `gigs` WHERE 2=2};
my #replacement_values = (); # These go into execute() instead of "?"s
foreach my $field (keys %form_data) {
next unless exists $fields{$field};
if ($form_data{$field} ne "*") {
$sql .= qq[ AND $fields{$field}->[0] $fields{$field}->[1] ?];
push #replacement_values, $form_data{$field};
}
}
my $grabgig = $hookup->prepare($sql);
$grabgig->execute(#replacement_values) or die "Did not execute";
I am assuming that you want to construct a query where only a few input parameters have valid values and the rest are undefined. If that is indeed what you want, here is what you could do: Construct the query dynamically. Here are the steps you could take assuming you are using CGI.pm and assuming that the where clause is just a series of "this = that" - In your case you have different operators - but the idea is the same.
First construct a "where" string from the CGI query parameter (Sorry untested code):
my $qrystr = '';
foreach ($query->param) {
if (my $val = $query->param($_)) {
$qrystr .= "where $_ = " . $dbh->quote($val) . ' and ';
}
}
$qrystr .= "where 1 = 1";
Now you can just prepare and execute the query : "select * from table $qrystr"
If you want automatic quoting you will have to use bind parameters which is an easy extension of the code above
Update There was a missing "where" in the last true clause "1 = 1" - Sorry, added it now
Sorry, the formatting bar was not appearing so, I rebooted. Now I cannot edit my question or comment.
What I am trying to do is provide a search for the users.
They select a city from a dropdown then some optional data can be entered / selected to narrow the results.
The optional data May or May Not be present in the table, could be a blank field.
I would like the results to show based on the selected criteria of the search in that City.
So, WHERE selected "input city" = "tables city column" look for the other options (ignore that particular criteria if field is empty) and return any matches that exist for that city.
I am then pushing into array in a While for output display.
I guess it would be like a car query. Select make where doors = 2 and color = red and engine = hamsterwheel but, the color field may be empty in the database..
I need to insert some data into mysql. I am not sure if I need to check the inputs OR format/strip them before they could be inserted into database fields as results returned from web may contain characters that mysql do not accept(I think). I have trouble with inserting tweets into mysql table. The type of field is varchar. This is insert statement in php script:
$json = $_POST['msg_top'];
$msg = json_decode($json);
foreach($msg->entry as $status)
{
$t = $status->content;
$query = "INSERT INTO msg2(id,msg,msg_id,depth) VALUES ('','$t','ID','3')";
mysql_query($query);
if(!mysql_query($query, $dbh))
{die('error:' .mysql_error());}
}
Yes, it's very important to escape all values before using them in an SQL command.
$json = $_POST['msg_top'];
$msg = json_decode($json);
foreach($msg->entry as $status) {
$t = mysql_real_escape_string($status->content);
$query = "INSERT INTO msg2(id,msg,msg_id,depth) VALUES ('','$t','ID','3')";
mysql_query($query);
if( !mysql_query($query, $dbh) ) {
die('error:' .mysql_error());
}
}
Also, other possible issues with your query:
If the id field is auto_increment'ing, you don't need it in the field or value list.
I may be missing something, but why are you using the string 'ID' for the msg_id field?
As for help troubleshooting this, I'd recommend just appending all of the $query strings to a log file for later inspection. Then, if problems aren't readily apparent, you can just manually try to run the command on the database (ie: maybe via PhpMyAdmin) and check out any error codes from there.