I had a task to slide images from a mysql database using jquery slide and not the animation scripts. The slide is supposed to show at least the most recent ten images that was uploaded. With that I first of all wrote a random query
mysql_query("select * from tblname order by rand() limit 1);
But as expected, it picks the images at random irrespective of when it was posted and of course it wasn't the most recent ten. After some thought I now had to first run a query to get the most recent ten
mysql_query("select * from tblname order by ID limit 10);
while($row=mysql_fetch_array($sql){
$slideid=$slideid.",".$row['recordid'];
}
this of course results to a variable of this order
$var="23,22,24,34,27,78,56,87,98,55";
I tried handling it like an array but it wasn't giving any positive result, hence I had an issue of how to pick this numbers and use it for the slide
$myArr=explode(',',$var);
sort($myArr);
for($i=0;$i<count($myArr);$i++)
{
echo $myArr[$i];
}
Edit: For better efficiency use:
$myArr=explode(',',$var);
sort($myArr);
foreach ($myArr as $val)
{
echo $val;
// Or do whatever else you want with each one.
}
Edit 2: See comments below on efficiency vs for loops vs unexpected results. :)
Based on your comments I will offer my 2p into the mix
this is what I did $slideid="23,22,24,34,27,78,56,87,98,55"; $arr =
explode(',',$slideid); foreach ($arr as $val) { //lets get the
variables from the form post $rs = mysql_query("SELECT * FROM tblname
WHERE id='$val'") or die(mysql_error());
while($row=mysql_fetch_array($rs)){ echo "<img src='image/$image'>"; }
} the images are displayed one by one using jquery slide
Now I think we are wasting time dealing with exploding this variable because mysql has the nifty IN() function (possibly in other db's I don't know)
$slideid = "23,22,24,34,27,78,56,87,98,55";
$rs = mysql_query("SELECT * FROM tblname WHERE id IN({$slideid})") or die(mysql_error());
while ($row = mysql_fetch_assoc($rs))
{
echo "<img src='image/{$row['image']}' />";
}
I hope this helps
$var="23,22,24,34,27,78,56,87,98,55";
$arr = explode(',',$var);
foreach ($arr as $val) {
// work with $val
}
explode splits the string to an array
1) Explode the string into an array, splitting on the comma.
2) You didn't say whether you wanted to re-order the numbers into numerical order, or process them in the order they're already in. If the former, sort the array with sort($arr);
3) Loop over the array in sequence and do something with each number
$str = '1,2,3,4,5,6';
$arr = explode(',', $str);
foreach($arr as $num) echo $num.'<br />';
Note if there is any change of spaces after commas, a better choice would be preg_split rather than explode, as this is more dynamic.
$arr = preg_split('/, ?/', $str);
You can achieve this using php explode function
$pieces = explode(",", $var);
echo $pieces[0]; // piece1
echo $pieces1; // piece2
.
.
.
echo $pieces[n]; // piece n
I think you need to get result of order with respect to order of variable here
$slideid = "23,22,24,34,27,78,56,87,98,55";
$rs = mysql_query("SELECT * FROM tblname WHERE id IN({$slideid}) ORDER BY FIELD(id, {$slideid}) ") or die(mysql_error());
while ($row = mysql_fetch_assoc($rs))
{
echo "<img src='image/{$row['image']}' />";
}
Related
I am trying to build a function that will be given an array. and from this array, iterate through an entire table in the database trying to find a match. If it does find a match. I would like it to echo out the ID of that match from the database table.
If possible I would also like it to say if it found any close matches?
What's making this tricky for me is that it needs to match all values despite their order.
for example, if the function is given this array:
$array = array(1,2,3,4,5)`
and finds this array in the database:
$array = array(2,3,5,1,4)
it should consider this a match
Also, if it finds
array(1,2,3,4,5,6)
It should output this this as a match except for value 6.
Let me refrase your question, is this correct?
Based on an array of ID's, return all records whose ID's are in the array.
If so, use the IN operator:
SELECT *
FROM tableName
WHERE columnName IN (value1, value2, value3, etc.)
So first we need to transform the given array into a comma-seperated list:
$comma_seperated = implode(', ', $array);
Now we have a comma-seperated list we can use in our query:
$comma_seperated = implode(', ', $array);
$query = "SELECT *
FROM tableName
WHERE id IN (" . $comma_seperated . ")";
// execute query, don't use mysql_* functions, etc. ;)
You could use any of the options:
option 1:
$array = array(1,2,3,4,5);
$query = "SELECT id FROM youtable WHERE id IN(".implode(",",$array).")";
option 2:
$array = array(1,2,3,4,5);
$query = "SELECT id FROM yourtable";//Select ids
Now iterate through query results, say results are stored in $query_results,
$result=array();
foreach($query_results as $row){
if(in_array($row['id'],$array)){
$result[] = $row['id'];
}
}
You can use array difference to get the result just run the code and you will understand
Case 1
$array1 = array(1,2,3,4,5);
$array2 = array(1,2,3,4,5,6);
$result = array_diff($array1, $array2);
print_r($result);
Case 2
$array1 = array(1,2,3,4,5);
$array2 = array(1,2,3,4,5,6);
$result = array_diff($array2, $array1);
print_r($result);
And after that you can the count of $result and put it in your logic.
Case 1:
Maybe you can select the unique values from the database.
SELECT DISTINCT unique_values_that_need_for_compare_column FROM table
This SQL result will be the $databaseValues variable value.
Than iterate through the array that the function gets.
foreach ($functionArray as $value) {
if (in_array($value, $databaseValues)) {
// you have a match
echo $value;
}
}
Case 2:
Or you can make a query for every value:
foreach ($functionArray as $value) {
$query = "SELECT COUNT(*) as match FROM table WHERE unique_values_that_need_for_compare_column = " . intval($value);
// fetch the result into the $queryResult variable and than check
if ($queryResult['match']) {
// you have a match
echo $value;
}
}
This question already has an answer here:
Closed 10 years ago.
Possible Duplicate:
How to sort the results of this code?
I have made this code which allows a user to type in a search bar a question. This code then takes that question and looks for watching words with questions in my database. It then counts the number of matching words for each question. Once done it then displays the top 4 best matched questions depending on how many words match.
However at the moment it displays these matches from lowest word match to highest word match (low-to-high) and I was it the other way around so that it displays the best match first (high-to-low). How do I do this in this code?
<?php
include("config.php");
$search_term = filter_var($_GET["s"], FILTER_SANITIZE_STRING); //User enetered data
$search_term = str_replace ("?", "", $search_term); //remove any question marks from string
$array = explode(" ", $search_term); //Seperate user enterd data
foreach ($array as $key=>$word) {
$array[$key] = " title LIKE '%".$word."%' "; //creates condition for MySQL query
}
$q = "SELECT * FROM posts WHERE " . implode(' OR ', $array); //Query to select data with word matches
$r = mysql_query($q);
$count = 0; //counter to limit results shown
while($row = mysql_fetch_assoc($r)){
$thetitle = $row['title']; //result from query
$thetitle = str_replace ("?", "", $thetitle); //remove any question marks from string
$title_array[] = $thetitle; //creating array for query results
$newarray = explode(" ", $search_term); //Seperate user enterd data again
foreach($title_array as $key => $value) {
$thenewarray = explode(" ", $value); //Seperate each result from query
$wordmatch = array_diff_key($thenewarray, array_flip($newarray));
$result = array_intersect($newarray, $wordmatch);
$matchingwords = count($result); //Count the number of matching words from user entered data and the database query
}
if(mysql_num_rows($r)==0)//no result found{
echo "<div id='search-status'>No result found!</div>";
}
else //result found
{
echo "<ul>";
$title = $row['title'];
if ($matchingwords >= 4){
?>
<li><a href='<?php echo $row['url']; ?>'><?php echo $title ?><i> No. matching words: <?php echo $matchingwords; ?></i></a></li>
<?php
$count++;
if ($count == 5) {break;
}
}else{
}
}
echo "</ul>";
}
?>
If you have saved you data in an array you can simply reverse it by using http://www.php.net/manual/en/function.array-reverse.php
Otherwise there are some sort functions
http://php.net/manual/en/function.sort.php
I think you have problem in sorting an array.
If you have an array, sorting is not a matter.
Having different types of sorting found in php.
arsort()
Sort an array in reverse order and maintain index association
http://www.php.net/manual/en/function.asort.php
You can use this array function or let me know your questions briefly.
you can write a own filter function
// sorts an array by direction
function arr_sort($arr, $index, $direction='asc')
{
$i_tab = array();
foreach ($arr as $key => $ele)
{
$i_tab[$key] = $arr[$key][$index];
}
$sort = 'asort';
if (strtolower($direction) == 'desc')
{
$sort = 'arsort';
}
$sort($i_tab);
$n_ar = array();
foreach ($i_tab as $key => $ele)
{
array_push($n_ar, $arr[$key]);
}
return($n_ar);
}
for example you have an array $arr = array('key' => 'value', 'key2' => 'value');
you can now sort by key2 asc with
$arr = arr_sort($old_arr, 'key2', 'desc');
so you can put the total count of matching words into your array as a node for any entry and filter it by it descending
note this requires Mysql version 4+
A fulltext sql query returns values based on relevance.
Example:
SELECT *, MATCH (title)
AGAINST ('$search_term' IN NATURAL LANGUAGE MODE) AS score
FROM posts;
This is how you would implement it
$q = "SELECT *,MATCH (title) AGAINST ('$search_term' IN BOOLEAN MODE) AS relevancy FROM
posts WHERE MATCH (title) AGAINST ('$search_term' IN BOOLEAN MODE) ORDER BY
relevancy DESC";
This will return the posts in order by relevancy. May need to remove the '' around $search_term but you can figure that out with testing.
Please read up on Fulltext sql queries and the match() function. It is all clearly documented.
im creating a search feature that will allow a user to type in a question, my code will then match as many words as possible with the questions already in my MySQL database and display the top 5 results depending on the amount of words that are matched in the question.
I use a count() function which counts the number of matching words, however at the moment the results shown are displayed as the first 5 results in the database that have a 50% word match or more. I want the results to be shown as the highest match first and work its way down for every result in the database but only show the top 5.
Here is the code I have
<?php
include("config.php");
$search_term = filter_var($_GET["s"], FILTER_SANITIZE_STRING); //User enetered data
$search_term = str_replace ("?", "", $search_term); //remove any question marks from string
$search_count = str_word_count($search_term); //count words of string entered by user
$array = explode(" ", $search_term); //Seperate user enterd data
foreach ($array as $key=>$word) {
$array[$key] = " title LIKE '%".$word."%' "; //creates condition for MySQL query
}
$q = "SELECT * FROM posts WHERE " . implode(' OR ', $array); //Query to select data with word matches
$r = mysql_query($q);
$count = 0; //counter to limit results shown
while($row = mysql_fetch_assoc($r)){
$thetitle = $row['title']; //result from query
$thetitle = str_replace ("?", "", $thetitle); //remove any question marks from string
$title_array[] = $thetitle; //creating array for query results
$newarray = explode(" ", $search_term); //Seperate user enterd data again
foreach($title_array as $key => $value) {
$thenewarray = explode(" ", $value); //Seperate each result from query
$wordmatch = array_diff_key($thenewarray, array_flip($newarray));
$result = array_intersect($newarray, $wordmatch);
$matchingwords = count($result); //Count the number of matching words from
//user entered data and the database query
}
if(mysql_num_rows($r)==0)//no result found
{
echo "<div id='search-status'>No result found!</div>";
}
else //result found
{
echo "<ul>";
$title = $row['title'];
$percentage = '.5'; //percentage to take of search word count
$percent = $search_count - ($search_count * $percentage); //take percentage off word count
if ($matchingwords >= $percent){
?>
<li><a href='<?php echo $row['url']; ?>'><?php echo $title ?><i> No. matching words: <?php echo $matchingwords; ?></i></a></li>
<?php
$count++;
if ($count == 5) {break;
}
}else{
}
}
echo "</ul>";
}
?>
The image below shows the what happens when I search "How to make my own website" in the search bar. I already have several questions in the database for testing which are all similar questions and one the last entry is an exact match to the question I asked, but as its currently showing them as the first 5 mathing results, it ignores the full match.
Here is the results from that search.
I have added a bit of code which shows how many word matches there are in each question just so you can see it working a bit better. Also its a coincidence that its in ascending order, it is showing the first 5 matching results in the database.
What code do I need to add to this to arrange it so that it shows the closest match from the entire database first then the second best match, third etc...?
Either you use a nested SQL query where you can order by count or load the values to array php array first and then sort the array. Using SQL is very efficient && faster.
Multi Dimension Array Sorting
select column1, column2,..., LENGTH(titlecolumn) - LENGTH(REPLACE(titlecolumn, '$search term', '')) AS nummatchwords from posts where " . implode(' OR ', $array) order by nummatchwords;
I want to make a php search query. First, I put a sentence and explode every word get $name,Then I put $name make a query to match all the name which is exist in my database. Then echo part $row['name'][$i] has some word repeat.
for example: the sentence is :Marc Gasol is the brother of Pau Gasol and Gasol in my database, so the match words Gasol apearl 2 times. how to echo $row['name'][$i]; and get only one Gasol? thanks,
$query = mysql_query("SELECT * FROM books WHERE name like '$name[0]' OR name like '$name[1]' OR name like '$name[2]' OR name like '$name[3]' ");
$i = 0;
while($row = mysql_fetch_array($query)) {
echo $row['name'][$i];
$i++;
}
$sentence = "Marc Gasol is the brother of Pau Gasol";
$words = preg_split("/\s+/", $sentence);
//this will uniqueify your value set
$uniqueWords = array_keys(array_flip($words));
foreach($uniqueWords as $word){
$parts[] = "name like '%".mysql_real_escape_string($word)."%'";
}
$where = implode(" OR ", $parts);
$query = mysql_query("SELECT * FROM books WHERE $where ");
$i = 0;
while($row = mysql_fetch_array($query)) {
echo $row['name'][$i];
$i++;
}
You could run another quick loop through your array and remove all duplicate words before you proceed to executing your sql query that way you don't search the name twice in the first place. That should work if I am understanding what you are wanting to do.
I have the following which produces results for me.
foreach($authArray as $key=>$value){
$query = mysql_query("SELECT * FROM table WHERE id='$value' LIMIT 1");
$author = mysql_fetch_assoc($query);
echo $author['fullname'] .', ';
}
It prints it out perfect, except on the last run it still adds the comma and space, is there a way i can strip this from the last result, so its:
name, name, name, name
Instead of the following
name, name, name, name,
Cheers
A better way of doing this would be to separate out the handling of database results from the view/output logic, and then you can sidestep the issue all together, using implode to allow PHP to join each of your authors together into a single string, split by your delimiter of a comma and a space:
// your loop {
$authors[] = $author['fullname'];
}
// your output
echo implode(', ', $authors);
Just concate the data into a string and then remove the last 2 chars using
$author['fullname'] = substr($author['fullname'], 0, -2);
Refer the manual for substr http://php.net/manual/en/function.substr.php
Instead of echoing each author out you could put them in a string and then simply use trim() to take off the trailing comma and finally echo the whole string.
this will probably work
foreach($authArray as $key=>$value){
$query = mysql_query("SELECT * FROM table WHERE id='$value' LIMIT 1");
$author = mysql_fetch_assoc($query);
//echo $author['fullname'] .', ';
}
$name_count = count($author[]);
for($x=0;$x<$name_count ;$x++){
if($x == $name_count -1){
echo $author['fullname'];
}else{
echo $author['fullname'].", ";
}
}
the idea is to detect the last array index, so that we can apply all the commas after each name except to the last one.
don't ever echo inside foreach
$var = '';
foreach($authArray as $key=>$value){
$query = mysql_query("SELECT * FROM table WHERE id='$value' LIMIT 1");
$author = mysql_fetch_assoc($query);
$var .= $author['fullname'] .', ';
}
echo trim($var,', ');