I have this query:
$relatedtags = $video->tags;
$relatedtagsagain = explode(",", $relatedtags);
$query_parts = array();
foreach ($relatedtagsagain as $item) {
$query_parts[] = "'%".mysql_real_escape_string($item)."%'";}
$string = implode(",", $query_parts);
$result = $cachedb->get_results("SELECT ".DB_PREFIX."videos.title,".DB_PREFIX."videos.id as vid,".DB_PREFIX."videos.thumb, ".DB_PREFIX."videos.views,".DB_PREFIX."videos.duration,".DB_PREFIX."users.name, ".DB_PREFIX."users.id as owner FROM ".DB_PREFIX."videos LEFT JOIN ".DB_PREFIX."users ON ".DB_PREFIX."videos.user_id = ".DB_PREFIX."users.id where ".DB_PREFIX."videos.tags LIKE {$query_parts[0]} OR ".DB_PREFIX."videos.tags LIKE {$query_parts[1]} limit 0,".get_option('related-nr')." ");
How can get results for more $query_parts[] like $query_parts[2] and $query_parts[3] or from all the array? using LIKE $query_parts[] wont work.
lets go back to the basic of programming, this can be solved in many ways, like using array_mapping(see comment of scrowler), loops and many more:
sample using foreach loop:
foreach ($relatedtagsagain as $item) {
$query_parts[] = " videos.tags LIKE " . "'%". mysql_real_escape_string($item) . "%' ";
}
$parsed_query_parts = implode('OR', $query_parts);
$result = $cachedb->get_results("SELECT ".DB_PREFIX."videos.title,".DB_PREFIX."videos.id as vid,".DB_PREFIX."videos.thumb, ".DB_PREFIX."videos.views,".DB_PREFIX."videos.duration,".DB_PREFIX."users.name, ".DB_PREFIX."users.id as owner FROM ".DB_PREFIX."videos LEFT JOIN ".DB_PREFIX."users ON ".DB_PREFIX."videos.user_id = ".DB_PREFIX."users.id WHERE" . $parsed_query_parts . " limit 0,".get_option('related-nr')." ");
Related
Ok, I assume that the title is not the best title, but let me explain my problem: I'm creating a website that needs to show posts of people (anyway), and I have to show their gravatar's profile picture, so this what I did:
<?php
function get_gravatar( $email, $s = 80, $d = 'mm', $r = 'g', $img = false, $atts = array() ) {
$url = 'https://www.gravatar.com/avatar/';
$url .= md5( strtolower( trim( $email ) ) );
$url .= "?s=$s&d=$d&r=$r";
if ( $img ) {
$url = '<img src="' . $url . '"';
foreach ( $atts as $key => $val )
$url .= ' ' . $key . '="' . $val . '"';
$url .= ' />';
}
return $url;
}
require("db.php");
$sql = "SELECT * FROM posts ORDER BY date DESC";
foreach ($db->query($sql) as $row) {
// var_dump($row);
$user = $row['user_id'];
$sql_user = "SELECT email FROM users WHERE id = $user";
foreach ($db->$sql_user as $row_user) {
var_dump($row_user);
echo "<img src=\"".get_gravatar($row_user['email'])."\"/>";
}
echo "<h2>".$row['title']."</h2><br/>";
echo "<p>".$row['content']."</p><br/>";
}
But, it doesn't work (well, it works, but it doesn't shows me the profile picture of the user, only the post).
So, I think the problem is that I can't call 2 times the variable $db at the same time, but I'm not sure, so that's m=why I'm asking if there is a way to fix my problem or to select 2 tables at the same time.
you can short your logic
$sql="SELECT u.email "
. "FROM posts AS p "
. "LEFT JOIN users AS u "
. "ON u.id=p.user_id "
. "ORDER BY p.date DESC";
use join
SELECT * FROM users join posts on users.id =Posts.user_id ORDER BY date DESC
you don't apply query to sql string in second foreach
foreach ($db->query($sql_user) as $row_user) {
see your second foreach you miss to put query function
foreach ($db->query($sql) as $row) {
foreach ($db->query($sql_user) as $row_user) {
You could just use JOIN
JOIN clause is used to combine rows from two or more tables, based on
a related column between them.
I am obtaining some values from an array and making a match against these values in an SQL Query.
The code for this is as follows:
foreach($files as $ex){
$search = substr($ex,3,4);
echo $search . '<br>';
echo '<br>';
$sql = 'SELECT DISTINCT `pdb_code` FROM pdb WHERE `pdb_code` <> "' . $search . '" LIMIT 4';
}
$result = mysql_query($sql) or die(mysql_error());
while($row = mysql_fetch_array($result)){
echo 'SQL' . $row['pdb_code'] .'<br>';
$pdb[] = $row['pdb_code'];
}
The issue that I am having is that the <> seems not to be working.. I have even tried using the != operator, but still having the same issue.
The output of $search from the array are :
101m
102l
102m
103l
The output of SQL from the query is still:
101m
102l
102m
103l
Your code doesn't seem that logical, as you generate numerous SQL statements and then just execute the last one.
However I assume what you want to do is take a list of files, extract a string from each file name and then list all the pdb_code values from the table which are not already in the string.
If so something like this would do it. It takes each file name, extracts the sub string and escapes it, putting the result into an array. Then it builds one query, imploding the array to use in a NOT IN clause:-
<?php
$search_array = array();
foreach($files as $ex)
{
$search = substr($ex,3,4);
echo $search . '<br>';
echo '<br>';
$search_array[] = mysql_real_escape_string($search);
}
if (count($search_array) > 0)
{
$sql = "SELECT DISTINCT `pdb_code` FROM pdb WHERE `pdb_code` NOT IN ('" . implode("','", $search_array) . "') LIMIT 4";
$result = mysql_query($sql) or die(mysql_error());
while($row = mysql_fetch_array($result))
{
echo 'SQL' . $row['pdb_code'] .'<br>';
$pdb[] = $row['pdb_code'];
}
}
You have to use not in:
SELECT * FROM table_name WHERE column_name NOT IN(value1, value2...)
Try this:
$searchIds = implode(',',$search);
$sql = "SELECT DISTINCT `pdb_code` FROM pdb WHERE `pdb_code` NOT IN ('$searchIds') LIMIT 4";
I am new to PHP and hope someone can help me with this.
I currently use the below lines to retrieve a value from a db and to output it as an array with the item's ID and value which works as intended.
Now I would need to do the same for multiple items so my input ($tID) would be an array containing several IDs instead of just a single ID and I would need the query to do an OR search for each of these IDs.
I was thinking of using a foreach loop for this to append " OR " to each of the IDs but am not sure if this is the right way to go - I know the below is not working, just wanted to show my thoughts here.
Can someone help me with this and tell me how to best approach this ?
My current PHP:
$content = "";
$languageFrm = $_POST["languageFrm"];
$tID = $_POST["tID"];
$stmt = $conn->prepare("SELECT tID, " . $languageFrm . " FROM TranslationsMain WHERE tID = ? ORDER BY sortOrder, " . $languageFrm);
$stmt->bind_param("s", $tID);
$stmt->execute();
$result = $stmt->get_result();
while($arr = $result->fetch_assoc()){
$content[] = array("ID" => $arr["tID"], "translation" => $arr[$languageFrm]);
}
My thought:
foreach($tID as $ID){
$ID . " OR ";
}
Many thanks for any help,
Mike
There are two approaches, assuming $tID is an array of IDs
Using MySQL IN() clause
This will work also when $tID is not an array, but a single scalar value.
$tID = array_map('intval', (array)$tID); // prevent SQLInjection
if(!empty($tID)) {
$query .= ' WHERE tID IN(' . implode(',', $tId) . ')';
} else {
$query .= ' WHERE 0 = 1';
}
Using OR clause, as you suggested
A bit more complicated scenario.
$conds = array();
foreach($tID as $ID) {
$conds[] = 'tID = ' . intval($ID);
}
if(!empty($conds)) {
$query .= ' WHERE (' . implode(' OR ', $conds) . ')';
} else {
$query .= ' WHERE 0 = 1';
}
As per above conditions you can try with implode();
implode($tID,' OR ');
You can also use IN condition instead of OR something like this.
implode($tID,' , ');
In my script below, the user inputs a form and rows are returned from a MYSQL table if rows are similar to inputted by the user. I am building a search engine and everything is based on rank. But I want to be able to adjust the code below to see how many times the word 'iPad' for example comes up with the row fields, which are 'title', 'description', 'keywords' and 'link'. If so, I want that row to return higher than say a row that has a higher id, but only mentions iPad once in all of the fields combined.
My code is below:
Terms together query:
$query = " SELECT * FROM scan WHERE ";
$terms = array_map('mysql_real_escape_string', $terms);
$i = 0;
foreach ($terms as $each) {
if ($i++ !== 0){
$query .= " AND ";
}
$query .= "title LIKE '%{$each}%' OR link LIKE '%{$each}%' OR keywords LIKE '%{$each}%' OR description LIKE '%{$each}%' ";
}
$query = mysql_query($query) or die('MySQL Query Error: ' . mysql_error( $connect ));
echo '<p class="time">Qlick showed your results in ' . number_format($secs,2) . ' seconds.</p>';
$numrows = mysql_num_rows($query);
if ($numrows > 0) {
while ($row = mysql_fetch_assoc($query)) {
$id = $row['id'];
$title = $row['title'];
$description = $row['description'];
$keywords = $row['keywords'];
$link = $row['link'];
$rank = $row['rank'];
Seperate Terms Query
$query = " SELECT * FROM scan WHERE ";
$terms = array_map('mysql_real_escape_string', $terms);
$i = 0;
foreach ($terms as $each) {
if ($i++ !== 0){
$query .= " OR ";
}
$query .= "title LIKE '%{$each}%' OR link LIKE '%{$each}%' OR keywords LIKE '%{$each}%' OR description LIKE '%{$each}%' ";
}
// Don't append the ORDER BY until after the loop
$query = mysql_query($query) or die('MySQL Query Error: ' . mysql_error( $connect ));
$numrows = mysql_num_rows($query);
if ($numrows > 0) {
while ($row = mysql_fetch_assoc($query)) {
$id = $row['id'];
$title = $row['title'];
$description = $row['description'];
$keywords = $row['keywords'];
$link = $row['link'];
$rank = $row['rank'];
I'd try to do this using an auxiliary field on which to run a FULLTEXT query, in which you would save all textual data:
http://dev.mysql.com/doc/refman/5.0/en/fulltext-search.html
The alternative is to run the filtering in MySQL and the ranking in PHP. You might squeeze some performance by running a single LIKE on the concatenated field.
By the way, your code above lacks parentheses in the LIKE, so that the results won't be correct: you mustn't ask WHERE field1 LIKE 'x' OR field2 LIKE 'x' AND field1 LIKE 'y' OR..., you must state WHERE (field1 LIKE 'x' OR field2 LIKE 'x') AND (field1 LIKE 'y' OR...).
// Here we search for ALL terms (all must be present at least once)
// use ' OR ' to ask that at least one term must be present once.
$where = array();
foreach($terms as $term)
$where[] = "( CONCAT(title,'|',link,'|',keywords) LIKE '%{$term}%')";
$query .= ' WHERE ' . '('.implode(' AND ', $where).')';
Now in the OR case you could do a simple ranking on the number of matched terms (with AND the number is always the total number of terms):
$select_fields[] '(' . implode ('+', $where) . ') AS ranking';
Otherwise in SQL you would need recourse to a really ugly hack:
(LENGTH(
REPLACE(CONCAT(title,'|',link,'|',keywords),'{$term}','')
) - LENGTH(CONCAT(title,'|',link,'|',keywords)))/LENGTH('{$term}');
This above calculates the difference between the total length of the text where the search is to be done and the total length of the same text, with search string removed. The difference is of course proportional to how many times the search string is there: if the string is 8 characters long, a difference of 32 would mean that it is present four times. Dividing the length difference by the length of the term, we obtain the number of hits.
The problem is that for several terms you have to complicate the query enormously, and it might be really expensive to run:
$select_fields = array('*');
$where = array();
$rank = array();
foreach($terms as $term)
{
// assume $term is NOT QUOTED
$search = mysql_real_escape_string($term);
$concat = "CONCAT(title,'|',link,'|',keywords)";
$where[] = "(${concat} LIKE '%{$search}%')";
$rank[] = "(LENGTH(REPLACE(${concat},'{$search}',''))
- LENGTH(${concat}))/LENGTH('{$search}')";
}
$select_fields[] = "(".implode(",", $rank).") AS ranking";
$query .= "SELECT " . implode(',', $select_fields)
. ' FROM scan WHERE (' . implode(' AND ', $where) . ')';
I have the following which returns
"soccertennisfootball"
$interestsquery = "SELECT * FROM user_interests WHERE user_id = " . $usersClass->userID();
$result = mysql_query($interestsquery);
while($row = mysql_fetch_array($result, MYSQL_ASSOC))
{
echo "{$row['interest']}";
}
Can somebody please explain how I can explode the data and assign it as variables? I've been looking around at tutorials but they all seem to have some sort of delimeter?
Ive tried the following oly its acting very weird and printing out multiple times?
the following...
$interestsquery = "SELECT * FROM user_interests WHERE user_id = " . $usersClass->userID();
$result = mysql_query($interestsquery);
while($row = mysql_fetch_array($result, MYSQL_ASSOC))
{
$interests[] = $row['interest'];
$interest1 = $interests[0];
$interest2 = $interests[1];
$interest3 = $interests[2];
print $interest1 . " - " . $interest2 . " - " . $interest3;
}
Prints out
"Tennis - Tennis - Footy - Tennis -Soccer - Footy"
They aren't a single string, you're just echoing it out. Store it somewhere. This code stores it in a new array. It may be useful but it really depends on what you want to do with it.
$interests = array();
while($row = mysql_fetch_array($result, MYSQL_ASSOC))
{
$interests[] = $row['interest'];
}
In each iteration of the while loop, you can only access one of the results (first 'soccer', then 'tennis', then 'football'). In your second code block, you're trying to somehow access all three inside the while loop.
Instead, inside the while loop, push that single result into an array:
$interests = array();
while($row = mysql_fetch_array($result, MYSQL_ASSOC)) {
$interests[] = $row['interest'];
//First 'soccer' will be pushed into $interests, then 'tennis', then 'football'.
}
Now that you have all the values in the array, you can access each individually. This is done OUTSIDE the while loop:
echo $interests[0] . ' - ' . $interests[1] . ' - ' . $interests[2];
This will print "soccer - tennis - football".
Alternately, like some have said, you can loop through the $interests array and echo each value, or do whatever else you'd like with them.
Put them in an array, then do as you will with it after.
$interests = array();
while (...)
{
$interests[] = $row['interest'];
}
Use extract method from php http://php.net/manual/en/function.extract.php
$interestsquery = "SELECT * FROM user_interests WHERE user_id = " . $usersClass->userID();
$result = mysql_query($interestsquery);
while($row = mysql_fetch_array($result, MYSQL_ASSOC))
{
extract($row);
echo $interest;
}
Use below snippet to store values in array
$interestsquery = "SELECT * FROM user_interests WHERE user_id = " . $usersClass->userID();
$result = mysql_query($interestsquery);
$result = array();
while($row = mysql_fetch_array($result, MYSQL_ASSOC))
{
$result[] = $row['interest']
}
print_r($result);
Given your clarifications (using MySQL, interest is the only column, and sample output) I would suggest using GROUP_CONCAT(). This puts it all on the MySQL side and allows you to pull the single row from $result.
Try the following sample query:
$query = "SELECT GROUP_CONCAT(interest SEPARATOR ' - ') FROM user_interests
WHERE user_id = " . $usersClass->userID() . "
GROUP BY user_id";