Php Seniors,
I still on OOP and mysqli. Not on pdo or oop yet. So, kindly show samples to that level, if you must.
Can you tell me if this query is ok to get row count ? It works on my side but I need your confirmation.
[code]
$query_2 = "SELECT * FROM users WHERE first_name = ? AND marital_status = ? LIMIT $offset,$last_row_on_page";[/code]
This is how my script works:
The rows_count() function uses the above query.
Then it forwards you to the fetch_rows() function. It fetches relevant rows for the paginated page and displays them in a pagination manner to you.
When you click any page numbers on the pagination links, like page 2, then the fetch_rows() is supposed to fetch the relevant rows again for page 2.
Rows fetching is done with this query:
[code]
$query_2 = "SELECT * FROM users WHERE first_name = ? AND marital_status = ? LIMIT $offset,$last_row_on_page";[/code]
Query is fine ? Yes or no ?
It displays matching rows using LOOP->While:
[code]
while($row = mysqli_fetch_array($result_2,MYSQLI_ASSOC))[/code]
Is my loop code ok ? I got it from the php manual. And so it should be ok.
MY ISSUE
The fetch_rows() or $query_2 fails to fetch any matching rows after I get passed page 1 no matter what page I click. Page 3, page 4, whatever link is found on the paginated section.
Bear in mind, my script manages to fetch all relevant matching rows for page 1. Remember, page 1 only. That is the problem. This while loop of mine does not kick start into action in any other pages passed page 1.
Code I set it to display 1 row per page as of now while in dev version.
There are 5 matching rows for my query,. Therefore, logically all matching rows are supposed to be spread across many pages via the pagination section.
I want to know from you:
Why only page 1 manages to fetch the relevant rows for the page (page 1) and display them while it fails to do the same for all other pages after page 1 ? All other pages (2,3,4) etc. fail to fetch any rows or display them. Why is that ? The WHILE loop must be failing, right ? During my tests, I noticed the WHILE loop does not act beyond page 1.
I must learn from you NOW the big mystery behind this as it is now 3-4 nights where I am going in circles!
You can easily see which lines I am struggling with if you ponder on the 'CAPITALISED' comments.
[code]
//Do following if "Search" button clicked.
if($_SERVER['REQUEST_METHOD'] === 'POST')
{echo __LINE__; echo "<br>";//DELETE
//Do following if "Search" button clicked.
if(isset($_POST['search']))
{echo __LINE__; echo "<br>";//DELETE
rows_count(); //This function will forward script flow to fetch_rows() before halting the script.
die();
}
}
echo __LINE__; echo "<br>";//On PAGINATION PAGE 2, THIS FAILS TO ECHO. IT IS LINE: 24.
//Do following if "Search" button not clicked but pagination numbered links are clicked. Eg Page 1, 2, 3, etc..
fetch_rows(); //On PAGINATION PAGE 2, THIS FUNCTION IS NOT GETTING TRIGGERED! WHY ?
echo __LINE__; echo "<br>";//On PAGINATION PAGE 2, THIS GETS ECHOED. IT IS LINE: 205.[/code]
Context of Code:[code]
<?php
error_reporting(E_ALL);
?>
<!DOCTYPE HTML">
<html>
<head>
<meta name="viewport" content="width-device=width, initial-scale=1">
</head>
<body>
<?php
session_start();
if(!isset($_GET['query_type']) && empty($_GET['query_type']))
{
die("Invalid Query!");
}
else
{
$_SESSION['query_type'] = $_GET['query_type']; echo __LINE__; echo "<br>";//DELETE
}
echo __LINE__; echo "<br>";//DELETE
if(!isset($_GET['form_type']) && empty($_GET['form_type']))
{
die("Invalid Form!");
}
else
{
$_SESSION['form_type'] = $_GET['form_type']; echo __LINE__; echo "<br>";//DELETE
if(!function_exists($_SESSION['form_type']))
{
die("Invalid Form!");
}
else
{echo __LINE__; echo "<br>";//DELETE
if(!session_id() || !isset($_SESSION['form_step']) || $_SESSION['form_step'] != 'end')
{
$_SESSION['form_step'] = 'start'; echo __LINE__; echo "<br>";//DELETE
$_SESSION['form_type']();
}
}
}
//FUNCTIONS START FROM HERE
function search()
{echo __LINE__; echo "<br>";//DELETE
function rows_count()
{
//Connect to Database. (DB_SERVER, BD_USERNAME, DB_PASSWORD, DB_NAME).
$conn = mysqli_connect("localhost","root","","powerpage");
$conn->set_charset('utf8mb4'); //Always set Charset.
if($conn === false)
{
die("ERROR: Connection Error!. " . mysqli_connect_error());
}
$query_1 = "SELECT COUNT(id) FROM users WHERE first_name = ? AND marital_status = ?";
$stmt_1 = mysqli_stmt_init($conn);
if(mysqli_stmt_prepare($stmt_1,$query_1))
{
mysqli_stmt_bind_param($stmt_1,"ss",$_POST["first_name"],$_POST["marital_status"]);
mysqli_stmt_execute($stmt_1);
$result_1 = mysqli_stmt_bind_result($stmt_1,$row_count);
mysqli_stmt_fetch($stmt_1);
$_SESSION['row_count'] = $row_count;
echo __LINE__; echo "<br>";//DELETE
$_SESSION['form_step'] = 'end';
fetch_rows();
}
}
function fetch_rows()
{ echo __LINE__; echo "<br>";//DELETE
$form_step = $_GET['form_step'];
$page_number = $_GET['page'];
$result_per_page = $_GET['page_limit'];
$offset = (($page_number * $result_per_page) - $result_per_page); //Offset (Row Number that 'Starts' on page).
$last_row_on_page = ($page_number * $result_per_page); //Max Result (Row Number that 'Ends' on page).
$previous_page = $page_number-1;
$next_page = $page_number+1;
echo "Row Start: $offset";echo "<br>";
echo "Row End: $last_row_on_page";echo "<br>";
//Connect to Database. (DB_SERVER, BD_USERNAME, DB_PASSWORD, DB_NAME).
$conn = mysqli_connect("localhost","root","","powerpage");
$conn->set_charset('utf8mb4'); //Always set Charset.
if($conn === false)
{
die("ERROR: Connection Error!. " . mysqli_connect_error());
}
$query_2 = "SELECT * FROM users WHERE first_name = ? AND marital_status = ? LIMIT $offset,$last_row_on_page";
$stmt_2 = mysqli_stmt_init($conn);
if(mysqli_stmt_prepare($stmt_2,$query_2))
{echo __LINE__; echo "<br>";//On PAGINATION PAGE 2, THIS GETS ECHOED. IT IS LINE: 103.
mysqli_stmt_bind_param($stmt_2,"ss",$_POST["first_name"],$_POST["marital_status"]);
mysqli_stmt_execute($stmt_2);
$result_2 = mysqli_stmt_get_result($stmt_2);
if(!$result_2)
{
//Close Connection.
mysqli_close($conn);
die("<pre>2c. Statement Fetching failed!</pre>");
}
else
{echo __LINE__; echo "<br>";//On PAGINATION PAGE 2, THIS GETS ECHOED. IT IS LINE: 114.
//Grab total number of pages to paginate.
$row_count = $_SESSION['row_count'];
//$total_pages = ceil($result_1/$result_per_page);
$total_pages = ceil($row_count/$result_per_page);
echo "TOTAL PAGES: $total_pages<br><br>";
while($row = mysqli_fetch_array($result_2,MYSQLI_ASSOC))//On PAGE 2, PHP IGNORING THIS AND BYPASSING THIS WHOLE WHILE LOOP ON PAGE 2. IT IS LINE: 122.
{echo __LINE__; echo "<br>";//On PAGE 2, THIS FAILS TO ECHO. IT IS LINE: 123. PHP IGNORING IT BYPASSING IT ON PAGE 2.
//Retrieve Values.
$id = $row["id"];
$first_name = $row["first_name"];
$middle_name = $row["middle_name"];
$surname = $row["surname"];
$gender = $row["gender"];
$marital_status = $row["marital_status"];
$working_status = $row["working_status"];
echo "Id: $id<br>";
echo "First Name: $first_name<br>";
echo "Middle Name: $middle_name<br>";
echo "Surname: $surname<br>";
echo "Gender: $gender<br>";
echo "Marital Status: $marital_status<br>";
echo "Working Status: $working_status<br>";
echo "<br>";
echo "<br>";
$i = 1;
while($i<=$total_pages)
{
if($i<$total_pages)
{
echo "<a href='http://localhost/power.page/pagination_test_simple_WORKING_ON_NOW.php?form_type=";?><?php echo $_SESSION['form_type'];?>&query_type=<?php echo $_SESSION['query_type'];?>&form_step=end&page_limit=1&page=<?php echo $i;?>'><?php echo " $i ";?></a><?php
}
elseif($i==$page_number)
{
echo "<a href='http://localhost/power.page/pagination_test_simple_WORKING_ON_NOW.php?form_type=";?><?php echo $_SESSION['form_type'];?>&query_type=<?php echo $_SESSION['query_type'];?>&form_step=end&page_limit=1&page=<?php echo $i;?>'><?php echo "<b> $i </b>";?></a><?php
}
$i++;
}
if($page_number>$total_pages)
{
echo "<a href='http://localhost/power.page/pagination_test_simple_WORKING_ON_NOW.php?form_type=";?><?php echo $_SESSION['form_type'];?>&query_type=<?php echo $_SESSION['query_type'];?>&form_step=end&page_limit=1&page=<?php echo $previous_page;?>'><?php echo "<b> Previous </b>";?></a><?php
}
}
}
}
$_SESSION['form_step'] = 'end';
}
?>
<form action="<?php echo $_SERVER['PHP_SELF'];?>?form_type=<?php echo $_SESSION['form_type'];?>&query_type=<?php echo $_SESSION['query_type'];?>&form_step=end&page_limit=1&page=1" method='post' enctype='plain/text'>
<?php
//Added '*' (asterisk) to indicate the 'Text Field' is a 'required' one.
echo "<label for=\"first_name\">First Name *:</label>
<input type=\"text\" name=\"first_name\" placeholder=\"First Name\" value = \"\">";?>
<br>
<?php
echo "<label for=\"marital_status\">Marital Status *:</label>";
echo "<select name=\"marital_status\">";
echo "<option value=\"single\">Single</option>";
echo "<option value=\"married\">Married</option>";
echo "</select>";
echo "<br>";
?>
<input type="submit" name="search" value="Search">
<?php
//$current_function = __FUNCTION__;
//echo $current_function;
//Do following if "Search" button clicked.
if($_SERVER['REQUEST_METHOD'] === 'POST')
{echo __LINE__; echo "<br>";//DELETE
//Do following if "Search" button clicked.
if(isset($_POST['search']))
{echo __LINE__; echo "<br>";//DELETE
rows_count(); //This function will forward script flow to fetch_rows() before halting the script.
die();
}
}
echo __LINE__; echo "<br>";//On PAGINATION PAGE 2, THIS FAILS TO ECHO. IT IS LINE: 24.
//Do following if "Search" button not clicked but pagination numbered links are clicked. Eg Page 1, 2, 3, etc..
fetch_rows(); //On PAGINATION PAGE 2, THIS FUNCTION IS NOT GETTING TRIGGERED! WHY ?
echo __LINE__; echo "<br>";//On PAGINATION PAGE 2, THIS GETS ECHOED. IT IS LINE: 205.
}
?>[/code]
What is wrong ? Why is fetch_rows() or $query_2 failing to fetch the matching rows for pages beyond page 1 ?
ECHOES
Before clicking the SUBMIT button, I get echoed these line numbers as expected:
[code]
22
24
32
39
42
50[/code]
After clicking the SUBMIT button I get these echoed as expected:
[code]
193
71
78
Row Start: 0
Row End: 1
103
114
TOTAL PAGES: 5
123[/code]
After clicking the link for 'page 2' on pagination section, I get echoed the same line numbers I get echoed before clicking the SEARCH button as if everything is starting all over with a new query when it is actually not making a new query. That is not supposed to happen.
I reckon line 200 is not taking action:
[code]
fetch_rows(); //On PAGINATION PAGE 2, THIS FUNCTION IS NOT GETTING TRIGGERED! WHY ? IT IS LINE: 200. MAIN ISSUE HERE, I SUSPECT.[/code]
What is your discovery in all this ? I've gone dumb & blind as of now!
