Displaying a progress bar in php file

Course Queries Syllabus Queries 2 years ago

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Posted on 16 Aug 2022, this text provides information on Syllabus Queries related to Course Queries. Please note that while accuracy is prioritized, the data presented might not be entirely correct or up-to-date. This information is offered for general knowledge and informational purposes only, and should not be considered as a substitute for professional advice.

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manpreet Tuteehub forum best answer Best Answer 2 years ago


I have a php file which selects a large amount of data from mutiple sql table. Naturally it takes a long time to complete the whole process. I want to display a progress bar which will express the progress of the script running. How to display a progress bar? The script below shows a portion of the php file.

php

//RIGHT(AdmitCode,1), PartCode, MID(AdmitCode,2,2),  MID(AdmitCode,1,1) DESC, RollCode
$query = "SELECT * FROM students1 ORDER BY PartCode, AdmitCode, yearcode  desc, RollCode";

$result = mysql_query($query);

// start a table tag in the HTML
echo ""; 
echo "";//$row['index'] the index here is a field name
echo "";

$ty=0;while($row = mysql_fetch_array($result)){//Creates a loop to loop through   results
    $ty++;if($ty%2==0)
        echo "";else
        echo "";
    echo "";}

echo "

List of candidates for Three year Degree (Honours/General) Programme Examination-".$bx1." (".$bx2.")

Sl. No ID Semester Roll No Registration No Name Honours Elective-1 Elective-2 Elective-3 MIL Foundation Soft studies Syllabus
$ty " . $row['StudentID']." " . $row['PartCode']." " . $row['AdmitRollNo'] . " " . $row['RegistrationNo']. " " . $row['Name'] . " " . $row['HonoursSubject'] . " ". $row['ElectiveSubject1'] . " ". $row['ElectiveSubject2'] . " ". $row['ElectiveSubject3'] . " ". $row['MIL'] . " ". $row['Foundation'] . " ". $row['SoftStudies'] . " ". $row['Syllabus'] . "
"
; //Close the table in HTML
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manpreet 2 years ago

Generally, to implement a good progress bar, you need a progress indicator from the layer which does the work, i.e. the mysql database. I am not aware, that mysql provides such a feature.

So you are stuck with estimating how long the operation will probably last (i.e. from past queries or derive it from the query parameters) and just implement a javascript progress bar (JQueryUI provides a good one), which is just time based.

Alternatively, you could just use a spinner to indicate, that you do not know how long this process really runs.


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