Php gurus, can you tell me is this query ok to get row count ? It works here:
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- $query_2 = "SELECT * FROM users WHERE first_name = ? AND marital_status = ? LIMIT $offset,$last_row_on_page";
Then it forwards you to the fetch_rows() function that fetches the rows and displays them in a pagination way to you.
When you click any page numbers on the pagination section, like page 2, then the fetch_rows() is supposed to fetch the relevant rows again for page 2.
Rows fetching is done with query:
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- $query_2 = "SELECT * FROM users WHERE first_name = ? AND marital_status = ? LIMIT $offset,$last_row_on_page";
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- while($row = mysqli_fetch_array($result_2,MYSQLI_ASSOC))
MY DIFFICULTY
The fetch_rows() or $query_2 fails to fetch any matching rows after page 1 no matter what page you click. Be it page 3, page 4, etc on paginating section.
However, it manages to fetch matching rows for page 1. Only page 1. That is the problem. This while loop does not trigger on any other pages apart from page 1.
Code is set to display 1 row per page in DEV MODE.
Since there are 5 matching rows, rows are supposed to be spread across many pages via pagination. Basic logic.
My problem, only page 1 manages to fetch relevant rows and display them. But all other pages (2,3,4) etc. fail to fetch any rows or display them. Why is that ? I must learn from you NOW. 3-4 nights going in circles!
You can easily see which lines I am struggling with if you put your eyes on the 'CAPITALISED' comments.
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- //Do following if "Search" button clicked.
- if($_SERVER['REQUEST_METHOD'] === 'POST')
- {echo __LINE__; echo "<br>";//DELETE
- //Do following if "Search" button clicked.
- if(isset($_POST['search']))
- {echo __LINE__; echo "<br>";//DELETE
- rows_count(); //This function will forward script flow to fetch_rows() before halting the script.
- die();
- }
- }
- echo __LINE__; echo "<br>";//On PAGINATION PAGE 2, THIS FAILS TO ECHO. IT IS LINE: 24.
- //Do following if "Search" button not clicked but pagination numbered links are clicked. Eg Page 1, 2, 3, etc..
- fetch_rows(); //On PAGINATION PAGE 2, THIS FUNCTION IS NOT GETTING TRIGGERED! WHY ?
- echo __LINE__; echo "<br>";//On PAGINATION PAGE 2, THIS GETS ECHOED. IT IS LINE: 205.
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- <?php
- error_reporting(E_ALL);
- ?>
- <!DOCTYPE HTML">
- <html>
- <head>
- <meta name="viewport" content="width-device=width, initial-scale=1">
- </head>
- <body>
- <?php
- session_start();
- if(!isset($_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.
- }
- ?>
ECHOES
Before clicking the SEARCH button, I get echoed these line numbers as expected:
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- 22
- 24
- 32
- 39
- 42
- 50
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- 193
- 71
- 78
- Row Start: 0
- Row End: 1
- 103
- 114
- TOTAL PAGES: 5
- 123
I reckon line 200 is not taking action:
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- fetch_rows(); //On PAGINATION PAGE 2, THIS FUNCTION IS NOT GETTING TRIGGERED! WHY ? IT IS LINE: 200. MAIN ISSUE HERE, I SUSPECT.
I still on OOP and mysqli. Not on pdo or oop yet. So, kindly show samples to that level, if you must.