Table 3 Columns Loop - php

I have read all the post about coding three columns for PHP. However, I can't seem to find any that will allow me to create three column loop. Everything I do either gives me an error or a blank white page. I also need to have a little space between the column loops. Here is what I have so far, can you tell me what I am missing?
table, td, th {
border: 1px solid #000;
text-align: left;
}
table {
border-collapse: initial;
width: 100%;
}
td {
padding: 10px;
width: 5%;
line-height: 2;
}
th {
background-color: grey;
color: white;
padding: 15px;
width: auto;
}
$sql = "SELECT name, email, dropdown, description FROM basic";
$result = $conn->query($sql);
if ($result->num_rows > 0) {
echo "<table>";
$columns=3;
// output data of each row
while($row = $result->fetch_assoc()) {
if ($row > 0 && ($columns) == 3) {
echo "<th>". $row["name"]. "</th><tr> <td>email: ". $row["email"]. "</td><tr> <td>category: " . $row["dropdown"] . "</td><tr><td>Announcement: " . $row["description"] . "</td></tr>";
}
}
echo "</table>";
} else {
echo "0 results";
}
$conn->close();

$sql = "SELECT name, email, dropdown, description FROM basic";
$result = $conn->query($sql);
if ($result->num_rows > 0) {
echo "<table>";
$columns=3;
$x = 0;
// output data of each row
echo "<tr>";
while($row = $result->fetch_assoc()) {
if ($row > 0 && ($columns) == 3) {
echo "<th>". $row["name"]. "</th><tr> <td>email: ". $row["email"]. "</td><tr> <td>category: " . $row["dropdown"] . "</td><tr><td>Announcement: " . $row["description"] . "</td></tr>";
if ($x == 3) {
echo "</tr>";
$x = 0;
}
$x++;
}
}
if ($x < 3) {
echo "</tr>";
}
echo "</table>";
} else {
echo "0 results";
}
$conn->close();
Explaination :-
within the while loop , we will check the variable $x which we set it to 0 outside the loop and increment it for every iteration ,
when that variable be equal to 3 we will print the end of row </tr>

Related

Hi, I am new to php and I cant find a way to make alternate table color in my code. It always show the wrong output that is required for me to follow

I did the nth child rule in css but it the colors are not alternate. Colors are all the same each rows and columns. My code is a multiplication table with a supposed alternate color. Im having a hard time knowing what I should do to modify or add in my php code to create the desired output (alternate colors in rows and columns in the multiplication table).
Below is my php code:
<?php
for($row=0; $row<=10; $row++){
echo "<tr>";
for($column=0; $column<=10; $column++){
if($row==0 && $column==0){
echo "<td></td>";
}
else{
echo "<td>". $row * $column. "</td>";
}
}
}
echo "</tr>";
?>
CSS code:
table, th, td {
border: 1px solid black;
}
td {
padding: 15px;
}
.bold{
font-weight: bold;
font-size: 1.3em;
}
table tr:nth-child(odd) {
background-color: yellow;
}
table tr:nth-child(even) {
background-color: red;
}
you forget to use the <table> tag and your CSS address it from the table.
<?php
echo "<table>";
for($row=0; $row<=10; $row++){
echo "<tr>";
for($column=0; $column<=10; $column++){
if($row==0 && $column==0){
echo "<td></td>";
}
else{
echo "<td>". $row * $column. "</td>";
}
}
echo "</tr>";
}
echo "</table>";
?>

Unusual table output from mysql php

Why am I getting those extra layers in the table output? I need to remove those extra layers from the table.What am I doing wrong? What is going on here exactly? Updated code.
<?php
$con=mysqli_connect("localhost","root", "", "cop");
if (mysqli_connect_errno()){
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
$sql= mysqli_query ($con, "SELECT FirstName, Practice FROM Members");
echo "
<style>th {
font: bold 11px 'Trebuchet MS', Verdana, Arial, Helvetica,
sans-serif;
color: #6D929B;
border-right: 1px solid #C1DAD7;
border-bottom: 1px solid #C1DAD7;
border-top: 1px solid #C1DAD7;
letter-spacing: 2px;
text-transform: uppercase;
text-align: left;
padding: 6px 6px 6px 12px;
background: #CAE8EA url(images/bg_header.jpg) no-repeat;
}
th.nobg {
border-top: 0;
border-left: 0;
border-right: 1px solid #C1DAD7;
background: none;
}</style>
<table border='1'>
<tr>
<th>FirstName</th>
<th>Practice</th>
</tr>";
while($row = mysqli_fetch_array($sql))
{
echo "<tr>";
echo "<td>" . $row['FirstName'] . "</td>";
echo "<td>" . $row['Practice'] . "</td>";
echo "</tr>";
}
echo "</table>";
Unusual Table output
If you were to do something like this you would be able to tell if there were empty column values in the data
while( $row = mysqli_fetch_array($sql) ){
if( !empty( $row['FirstName'] ) && !empty( $row['Practice'] ) ){
$firstname=$row['FirstName'];
$practice=$row['Practice'];
} else{
$firstname=$practice='empty';
}
echo "
<tr>
<td>{$firstname}</td>
<td>{$practice}</td>
</tr>";
}
Alternatively just output the row if it is known to contain values rather than having empty cells
while( $row = mysqli_fetch_array($sql) ){
if( !empty( $row['FirstName'] ) && !empty( $row['Practice'] ) ){
$firstname=$row['FirstName'];
$practice=$row['Practice'];
echo "
<tr>
<td>{$firstname}</td>
<td>{$practice}</td>
</tr>";
}
}
I pasted your code on my Notepad++ and in it were errors which the browser cannot forgive. In fact you can even receive a 1 month suspended sentence from your browser. Below is my version of your code. I have ignored the style. You can add style after the code is working.
<?php
$con=mysqli_connect("localhost","root", "", "cop");
if (mysqli_connect_errno()){
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
$sql= mysqli_query($con, "SELECT FirstName, Practice FROM Members");
$result = '';
if(mysqli_num_rows($sql) > 0){
while($row = mysqli_fetch_array($sql)){
$FirstName = $row['FirstName'];
$Practice = $row['Practice'];
$result .= "<tr><td>" . $FirstName . "</td><td>" . $Practice . "</td></tr>";
}
}
if(isset($result)){
echo "<table border='1'>";
echo "<tr><th>FirstName</th><th>Practice</th></tr>";
echo $result;
echo "</table>";
}
?>

Matrix creation failed in PHP

I am trying to build a 4x4 matrix like structure in PHP using HTML table.
There can be n number of elements. So calling it 4x4 matrix is kinda appropriate. There can be any number of rows. But a row can have only 4 columns.
Here's what I am trying to make.
Fiddle for this structure is here.
And this is what I am getting as output.
PHP Code:
<table class="tablematrix content table-striped">
<?php
$total=7;
if($total%4==0)
{
$tr=$total/4;
}
else
{
$tr_temp=$total/4;
$tr=$tr_temp+1;
}
for($i=1;$i<=$tr;$i++)
{
echo '<tr>';
for($j=1;$j<=$total;$j++)
{
echo '<td>'.$j.'</td>';
}
echo '</tr>';
}
?>
</table>
CSS
<style>
.tablematrix {
border-collapse:collapse;
table-layout:fixed;
}
.tablematrix * {
height:50px;
width:50px;
min-width:50px;
min-height:50px;
margin:0px;
padding:0px;
}
.tablematrix th,
.tablematrix td {
text-align: center;
border: 1px solid #dddddd;
}
.tablematrix th {
font-weight: bold;
}
.tablematrix tbody > tr:nth-child(odd) > td,
.tablematrix tbody > tr:nth-child(odd) > th {
background-color: #f9f9f9;
}
</style>
Output here
I am kinda stuck here. Don't know how to proceed. Any suggestions?
This code should work
<table class="tablematrix content table-striped">
<?php
$total=7;
$tr=$total;
$count=1;
for($i=1;$i<=$tr;$i++)
{
echo '<tr>';
for($j=1;$j<=4;$j++)
{
echo '<td>'.$count.'</td>';
$count=$count+1;
}
echo '</tr>';
}
?>
</table>
Please try this. You are making a logical mistake. I didn't test my code. So let me know if my code is not working. Thanks.
You can check my ideone here https://ideone.com/STHC7H. Its showing your desired output. So as you said $total is the total number of elements instead of total number of rows the following code will give you correct result
<?php
$total=7;
if($total%4==0)
{
$tr=$total/4;
}
else
{
$tr_temp=$total/4;
$tr=$tr_temp+1;
}
$count=1;
for($i=1;$i<=$tr;$i++)
{
echo '<tr>';
for($j=1;$j<=4;$j++)
{
if($count==$total+1)
break;
echo '<td>'.$count.'</td>';
$count=$count+1;
}
echo '</tr>';
}
?>
I hope it will solve your problem
Check this code:
<table class="tablematrix content table-striped">
<?php
$row=6;
$col=4;
$total=$row*$col;
echo "<tr>";
for($i=1;$i<=$total;$i++)
{
echo "<td>".$i."</td>";
if($i%$col==0)
{ echo '</tr>';
if($i!=$total)
echo '<tr>';
}
}
?>
</table>
OR
<table class="tablematrix content table-striped">
<?php
$total=24;
echo "<tr>";
for($i=1;$i<=$total;$i++)
{
echo "<td>".$i."</td>";
if($i%4==0)
{ echo '</tr>';
if($i!=$total)
echo '<tr>';
}
}
?>
</table>
Amount of columns = "" => 4.
Amount of Rows = "" = ?
Look at this part of your code
echo '<tr>';
for($j=1;$j<=$total;$j++)
{
echo '<td>'.$j.'</td>';
}
echo '</tr>';
you have set $total to 7 so you are runing 7 times and creating 7 columns instead of row which would have made more sense so basically you need to transpose your matrix
Here you have:
<?php
$rows = 6;
$cols = 4;
for ($i = 1; $i <= $rows; $i++) {
echo '<tr>';
for ($l = 1; $l <= $cols; $l++) {
echo '<td>'.((($i - 1) * $cols) + $l).'</td>';
}
echo '</tr>';
}
?>
Tested, should do the job..
You can use this function. It can be optimised not to use $tmp variable
function createHtmlMatrix ($w, $h) {
$matrixHtml = '<table class="tablematrix content table-striped">';
$tmp = 0;
for ($i = 0 ; $i < $h ; ++$i) {
$matrixHtml .= '<tr>';
for ($j = 0 ; $j < $w ; ++$j) {
$matrixHtml .= '<td>'.(++$tmp).'</td>';
}
$matrixHtml .= '</tr>';
}
$matrixHtml .= '</table>';
return $matrixHtml;
}
echo createHtmlMatrix(4,5);
try this
<?php
$row = 6;
$column = 3;
echo "<table style = 'border: 1px solid black'>";
for($x= 0; $x<= $row; $x++){
echo "<tr>";
for($y=0; $y<= $column; $y++){
echo "<td>";
echo $y;
echo "</td>";
}
echo "</tr>";
}
echo "</table>";
?>

Keep values in input fields - php array

I have a php array that includes inputs for posting. It uses a counter for each array record, and this counter is applied to the name of the input to be used in performing some actions with the post - this is working great.
The issue is that I would like to keep the users' existing inputs and re-populate the input fields in the array if their post doesn't pass validation.
I have done this before with static fields, simply storing the post variable and echoing it in the "value" --- but I can't figure out how to do this when working with an array. Anyone have any ideas?
$counter = 0;
echo "<form method='post'>";
echo "<table class='mainlist' width='680'>";
while ($row = mysqli_fetch_array($result)) {
echo "<tr height='60'>";
echo "<td class='mainlist'><input type=text name=options[$counter] autocomplete=off onclick='this.select()' class='txt'></td>";
echo "</tr>";
$counter = $counter + 1;
}
echo "</table>";
Full code per request:
<?php
if($_SERVER["REQUEST_METHOD"] == "POST")
{
$userid = $_SESSION['login_user'];
$companyid = $_POST['companyid'];
$options = $_POST['options'];
$counter = $_POST['hiddencounter'];
$runningtotal=0;
$totaloptions = array_sum($options);
$result = mysqli_query($connection, "SELECT options_balance FROM user_options_balance WHERE user_id = '".$userid."'");
for ($i=0; $i<$counter; $i++)
{
if(empty($options[$i]))
{ /* IF NO INPUT ON OPTIONS */
/* DO NOTHING */
}
else
{
$checknewcompanies = mysqli_query($connection, "SELECT company_id FROM user_company_total_invested WHERE user_id = '".$userid."' and company_id = '" .$companyid[$i]."'");
if($checknewcompanies->num_rows == 1)
{ // do nothing
}
else
{
$runningtotal = $runningtotal + 1;
}
} /* END OF ELSE IF NOT EMPTY OPTIONS */
} /* END OF FOR LOOP */
$checkcurrentcompanies = mysqli_query($connection, "SELECT company_id FROM user_company_total_invested WHERE user_id = '".$userid."'");
$countcompanies = $checkcurrentcompanies->num_rows;
$countcheck = $runningtotal + $countcompanies;
if($countcheck <= 4)
{
while($row = mysqli_fetch_array($result))
{
$balance = $row['options_balance'];
}
if ($totaloptions>$balance)
{
$notenoughoptions= "<div style='background-color:#FF0000; border-radius: 15px; padding: 10px; color: #FFFFFF; font-size: 12px;'>Oops! You don't have enough options! Try investing less!</div>";
}
else
{
// loop through array
for ($i=0; $i<$counter; $i++)
{
if(empty($options[$i])){ /* IF NO INPUT ON OPTIONS */
/* DO NOTHING */
}
else {
if(!ctype_digit($options[$i]) or !is_numeric($options[$i])){
$charactercheck= "<div style='background-color:#FF0000; border-radius: 15px; padding: 10px; color: #FFFFFF; font-size: 12px;'>Oops! Please enter only positive numbers to invest!</div>";
}
else {
$checkcompanies = mysqli_query($connection, "SELECT company_id FROM company_main WHERE company_id = '".$companyid[$i]."'");
if($checkcompanies->num_rows != 1)
{
$companynotexist= "<div style='background-color:#FF0000; border-radius: 15px; padding: 10px; color: #FFFFFF; font-size: 12px;'>Oops! That company doesn't exist!</div>";
}
else
{
// loop through array
for ($i=0; $i<$counter; $i++)
{
if(empty($options[$i]))
{ /* IF NO INPUT ON OPTIONS */
/* DO NOTHING */
}
else
{
$query = "INSERT INTO user_company_invested(user_id, company_id, user_company_options_invested)
VALUES($userid,$companyid[$i],$options[$i])";
mysqli_query($connection, $query);
} /* END OF ELSE IF NOT EMPTY OPTIONS */
} /* END OF FOR LOOP */
$balancecheck = mysqli_query($connection, "SELECT options_balance FROM user_options_balance WHERE user_id = '".$userid."'");
while($row = mysqli_fetch_array($balancecheck))
{
$balance2 = $row['options_balance'];
}
if($balance2 > 0)
{
header('Location: user_invest.php');
}
else
{
header('Location: user_market.php');
}
} // end company check
} //end character check
} //end empty option check
} //end loop
} /* END OF NOT ENOUGH OPTIONS CHECK */
}
else
{
$toomanycompanies = "<div style='background-color:#FF0000; border-radius: 15px; padding: 10px; color: #FFFFFF; font-size: 12px;'>Oops! You can invest in a maximum of 4 companies per week. Please choose fewer companies, or invest more in some of your existing companies!</div>";
/* echo "Maximum number of companies you can invest in is 4";
echo "<br />";
echo "Companies you already are invested in: ".$countcompanies;
echo "<br />";
echo "New companies you are trying to invest in: ".$runningtotal;
echo "<br />";
echo "Total: ".$countcheck;*/
}
} /* END OF ISSET CHECK */
else
{
}
?>
<?php
$result = mysqli_query($connection,"SELECT * from company_main");
$counter=0;
echo "<form method='post'>";
echo "<table class='mainlist' width='680'>";
while($row = mysqli_fetch_array($result))
{
echo "<tr height='60'>";
echo "<td class='mainlist' width=140 align='center'>" . "<img src='".$row['company_logo']."' width='40'/>" . "</td>";
echo "<td class='mainlist' align='left' width=390 style='font-size: 15px;'>" . $row['company_name'] . "</td>";
echo "<input type=hidden name=companyid[$counter] value=" . $row['company_id'] . " />";
echo "<td class='mainlist'><input value='{$_POST['options[$counter]']}' type=text name=options[$counter] autocomplete=off onclick='this.select()' class='txt' style=' background-color: #FCFCFC;
border: solid 1px #CCCCCC;
font-size: 12px;
padding: 5px;
height: 20px;
text-align: right;'></td>";
echo "</tr>";
$counter=$counter+1;
}
echo "</table>";
echo "<input type='hidden' name='hiddencounter' value='$counter'>";
echo "
<table>
<tr>
<td width='630' height='50'></td>
<td align='right' width='60' style='color: #848580; font-size: 20px;'>Total: </td>
<td align='right' width='40' style='color: #94D90B; font-size: 20px; font-weight: bold; padding-right:20px;'><span id='sum'>0</span></td><td width='10'></td>
</tr><tr height='20px'></tr><tr>
<td width='570' align='center' style='color: #94D90B; font-size: 12px;'>";?>
<?php echo $notenoughoptions; ?>
<?php echo $charactercheck; ?>
<?php echo $toomanycompanies; ?>
<?php echo "
</td>
<td colspan='2' width='100' align='right'><input name='userinvestoptionsdynamic' type='submit' value='Invest!'></td><td width='10'></td>
</tr>
<tr height='20px'></tr>
</table>";
echo "</form>";
?>
The correct syntax is:
echo "{$arrayname($keyname)}";
So for example echo('value=' . $_POST['options'][$counter]); becomes:
echo "value={$_POST['options'][$counter]}";

The first result of search term did not come out

Why always do the first result of my search term will not come out?
I noticed that it will only appear when I navigate to the page number 0.
How can I solve this?
I hope that when I navigate to page number 1, the first result will come out too!
PHP Code:
<?php
//php code goes here
include 'connect.php'; // for database connection
include 'script_suggestion.php';
include 'script_close_suggestion_box.php';
$query = $_GET['q']; // query
$button = $_GET ['submit'];
if (isset($_GET['page'])) {
$page_number = (int)$_GET['page'];
$page_number = mysqli_real_escape_string($page_number);
} else {
$page_number = 1;
}
$results_per_page = 10;
?>
HTML Code:
<html>
<head>
<title>
Brandon's Search Engine
</title>
<style type="text/css">
#title a {
font-size: 17pt;
margin: 5px;
padding: 2px;
border-color: black;
text-decoration: underline;
width: 544px;
}
#search-result {
display: block;
border: 1px solid grey;
border-color: grey;
}
#search-result:hover {
background-color: #dddddd;
width: 544px;
}
#link {
font-size: 17pt;
margin: 5px;
padding: 2px;
width: 544px;
}
#description {
font-size: 17pt;
margin: 5px;
padding: 2px;
width: 544px;
}
#search-page-number {
display: block;
width: auto;
height: auto;
border: 1px solid gray;
margin: 2px;
padding-left: 5px;
padding-right: 5px;
padding-bottom: 2px;
padding-top: 2px;
list-style: none;
float: left;
text-align: center;
}
#search-page-number:hover {
background-color: #dddddd;
}
#suggestion {
border: 1px solid black;
visibility: hidden;
position: absolute;
background-color: white;
z-index: 10;
}
#suggestion a {
font-size: 12pt;
color: black;
text-decoration: none;
display: block;
width: 548px;
height: auto;
text-align: left;
padding: 2px;
}
#suggestion a:hover {
background-color: #dddddd;
width: 544px;
padding: 2px;
}
</style>
</head>
<body>
<form method="GET" action="search.php">
<table>
<tr>
<td>
<h2>
Brandon's Search Engine
</h2>
</td>
</tr>
<tr>
<td>
<input type="text" value="<?php echo htmlspecialchars($_GET['q']); ?>" name="q" style="height: 27px; width: 550px; padding: 2px" name="q"
onkeyup="getSuggestion(this.value)" autocomplete="off" onblur="closeBox()" placeholder="Search Now"/>
<input type="submit" value="Search" style="height: auto; width: 60px; padding: 2px" />
<div id="suggestion" style="width: 548px">
</div>
</td>
</tr>
</table>
<br>
<hr>
<table>
<tr>
<td>
<?php
//count
$count_sql = "SELECT count(*) as c FROM searchengine WHERE title LIKE '%" . mysqli_real_escape_string($con,$query) . "%' OR keywords LIKE '%" . mysqli_real_escape_string($con,$query) . "%' OR link LIKE '%" . mysqli_real_escape_string($con,$query) . "%' ";
$search_count = mysqli_fetch_array(mysqli_query($con,$count_sql));
$number_of_result = $search_count['c'];
//SQL query
$page_number = (int)$_GET['page'];
$stmt = "SELECT * FROM searchengine WHERE title LIKE '%" . mysqli_real_escape_string($con,$query) . "%' OR keywords LIKE '%" . mysqli_real_escape_string($con,$query) . "%' OR link LIKE '%" . mysqli_real_escape_string($con,$query) . "%' LIMIT " . $page_number . " , $results_per_page";
$result = mysqli_query($con,$stmt) or die(mysqli_error($con));
//$number_of_result = mysqli_num_rows($result);
if ($number_of_result < 1) {
echo "<b>No results found!</b>";
echo "<p>";
echo "Your search - <b>$query</b>" . " - did not match any documents. Please try different keywords.";
}
elseif ($number_of_result > 1) {
echo "<b>$number_of_result results found!</b>";
echo "<p>";
//results found here and display them
while (($row = \mysqli_fetch_array($result))) {//10 results per page
$title = $row["title"];
$description = $row["description"];
$link = $row["link"];
echo "<div id='search-result'>";
echo "<div id='title'><a href='$link'>" . $title . "</a></div>";
//echo "<br />";
echo "<div id='link'><small>" . $link . "</small></div>";
//echo "<p>";
echo "<div id='description'><small>" . $description . "</small></div>";
echo "</div>";
echo "<br />";
}
}
elseif ($number_of_result == 1) {
echo "<b>$number_of_result result found!</b>";
echo "<p>";
//results found here and display them
while (($row = \mysqli_fetch_array($result))) {//10 results per page
$title = $row["title"];
$description = $row["description"];
$link = $row["link"];
echo "<div id='search-result'>";
echo "<div id='title'><a href='$link'>" . $title . "</a></div>";
//echo "<br />";
echo "<div id='link'><small>" . $link . "</small></div>";
echo "<br />";
echo "<div id='description'><small>" . $description . "</small></div>";
echo "</div>";
echo "<br />";
}
}
?>
</td>
</tr>
<tr>
<td>
<input type="hidden" name="page" value="<?php echo 1; ?>" />
<div id="page-number">
<?php
$max_page_number = ceil($number_of_result / $results_per_page);
if ($number_of_result == 0) {
echo " ";
}
elseif ($number_of_result != 0) {
echo "You are on page $page_number of $max_page_number.";
}
//ie if 35 results are therer then we require 4 pages that are 0 to max_page_number
//current page number is equal to page_number
//echo $max_page_number;
echo "<ul>";
//both the condition are not the neccesary
if ($max_page_number >= 1) { // if more than 2 pages
if ($page_number != 1) { //First
echo "<li id='search-page-number'>";
echo "<a href=search.php?q=$query&page=1>First</a>";
echo "</li>";
}
if ($page_number != 1) { //Previous
echo "<li id='search-page-number'>";
$prev = $page_number - 1;
echo "Previous";
echo "</li>";
}
for($index = 1 ; $index <= $max_page_number ; $index++) {
echo "<li id='search-page-number'>";
echo "<a href=search.php?q=$query&page=".($index).">";
echo ($index) . "</a>";
echo "</li>";
}
if ($page_number != $max_page_number) { //Next
echo "<li id='search-page-number'>";
$next = $page_number + 1;
echo "Next";
echo "</li>";
}
if ($page_number != $max_page_number) { //Last
echo "<li id='search-page-number'>";
echo "Last";
echo "</li>";
}
} elseif (($max_page_number == 1 ) ) {
echo "<li id='search-page-number'>";
echo "<a href=search.php?q=$query&page=1>1</a>";
echo "</li>";
}
echo "</ul>";
?>
</div>
</td>
</tr>
<tr>
<td align="center">
To insert your site in result fill in the form at here.
</td>
</tr>
</table>
</form>
</body>
</html>
Your query ends with:
"LIMIT " . $page_number . ", $results_per_page"
But that's not how the LIMIT clause works in SQL. It's defined to be:
LIMIT offset, row_count
offset is a row number, starting from 0. So if you do:
LIMIT 1, 10
You'll get records 2 through 11, not 1 through 10. The correct way to do it is:
"LIMIT " . ($page_number-1)*$results_per_page . ", $results_per_page"
Something else you should find useful is the SQL_CALC_FOUND_ROWS option to the SELECT statement. This tells MySQL to calculate how many total rows matched the criteria, even though you used LIMIT to return just a subset. This way you don't have to do two queries, one with COUNT(*) and another to get a page of data. After doing a query with this option, you can use SELECT FOUND_ROWS() to get the full count.
$safequery = mysqli_real_escape_string($con,$query);
$stmt = "SELECT SQL_CALC_FOUND_ROWS *
FROM searchengine
WHERE title LIKE '%" . $safequery . "%'
OR keywords LIKE '%" . $safequery . "%'
OR link LIKE '%" . $safequery . "%'
LIMIT " . ($page_number-1)*results_per_page . " , $results_per_page";
$result = mysqli_query($con,$stmt) or die(mysqli_error($con));
$count_sql = "SELECT FOUND_ROWS() AS c";
$search_count = mysqli_fetch_array(mysqli_query($con,$count_sql));
$number_of_result = $search_count['c'];

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