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@NogDogMar 11.2016 — #In the spirit of divide and conquer, let's look at the validation of the student name and number. We can use the same sort of file parsing as we did for the course data. This time, let's put it all into a function, so that we can keep it separated from the main flow, and also have something that could easily be re-used anywhere you need to do that validation.
The test section at the end outputs:
Where I used $student['name'] and $student['number'] in the test, you'd actually use the values from the form: $_POST['studentname'] and $_POST['studentnumber'] where/when you want to actually validate those inputs. The nice thing about this is that the function definition can be anywhere within the file (just not inside any kind of conditional or loop block), so you can keep it out of the way of the main flow of the script.@NogDogMar 13.2016 — #Your if condition tests if the variables are set, but not if they are valid. Youu could add an "and" to the condition:
@NogDogMar 13.2016 — #Nope, I was referencing this code:
As written, the if() only checks if the input values are set. Within the block of code that gets executed if the if() is true, you call the validation function, but don't actually do anything with it, so it serves no actual purpose. Moving the call to the validation function into the if() condition makes it actually help determine what happens (the if block only gets executed if the variables are set AND then they pass validation).
[RESOLVED] PHP form: check if user input matches values in .txt files
After looking at some examples, I’m not sure if I’m on the right path for this.
I am working on having the user input checked after Submit Form is pressed to ensure the Student Name and Student Number match an existing record in [B]student.txt[B]courses.txt
If the student name and student number match one of the records in [B]student.txt[B]enrollment.txt
In this section of coding under [I]// Check to see if input of $studentname matches a name in student.txt[I]//echo “<option value=”$field[1]”>$field[0] $field[1]</option>n”;
I have a PHP form with 2 user inputs, 1 user select, a clear button and submit button:
– Input box for Student Name
– Input box for Student Number
– Drop down list with 4 available courses with the course name and
course code
I have [B]courses.txt
[CODE]
Animation Film Design:AFD-250:6
Digital Sculpture:DS-410:4
History of Animation:HA-240:6
Visual Effects:VE-298:4
I have [B]student.txt
[CODE]
Riley Anderson:PX-06-009
Tinker Bell:DY-43-200
Carl Fredricksen:PX-45-767
Edith Gru:DW-21-492
Mad Hatter:DY-03-195
Buzz Lightyear:PX-34-121
Stuart Little:CP-17-199
Bob Minion:DW-34-628
Thomas O’Malley:DY-21-987
Kitty Softpaws:DW-07-201
James Sullivan:PX-01-111
Mike Wazowski:PX-68-524
Sheriff Woodie:PX-32-597
[code=php]<html>
<head>
<title>Registration Form</title>
<style>
body{background-color: #ffffe6; width:610px;}
h1 {color: #29a3a3;}
.inputbox {padding: 7px; border: #FF9966 1px solid; border-radius: 4px;}
.btn {padding: 10px; background-color: #29a3a3; border: solid 1px #FF9966; border-radius: 4px; color: #FFFFFF; font-weight: bolder; cursor: pointer;}
</style>
</head>
<body>
<?php
ini_set(‘display_errors’, 1);
error_reporting(E_ALL);
// Sanitization and Validation coding will go here
// Define and set variables
$studentname = “”;
$studentnumber = “”;
$courses = ” “;
$datafile = “student.txt”;
$in = fopen (‘courses.txt’, ‘r’) or die (“courses.txt cannot be opened for reading.”);
// Check to see if input of $studentname matches a name in student.txt
if (isset ($_POST[‘student.txt’])) {
$studentname = htmlentities ($_POST[‘student.txt’]);
$DB = fopen ($datafile, ‘r’) or die (“$datafile cannot be opened for reading.”);
$found = FALSE;
while ($record = fgets ($DB) and ! $found) {
$field = explode (“:”, htmlentities (trim ($record)));
$found = $studentname === $field[0];
}
fclose ($DB);
if ($found) {
echo “<p>$field[0] $field[1].</p>n”;
}
}
$DB = fopen ($datafile, ‘r’) or die (“$datafile cannot be opened for reading.”);
while ($record = fgets ($DB) ) {
$field = explode (“:”, htmlentities (trim ($record)));
//echo “<option value=”$field[1]”>$field[0] $field[1]</option>n”;
}
fclose ($DB);
$filename = ‘test.txt’;
if(file_exists($filename)) {
if($handle = fopen($filename, ‘r’)) {
$name = array();
while(($file = fgets($handle)) !==FALSE) {
preg_match(‘#(.*):(.*)#’, $file, $match);
$array = explode(‘,’, $match[2]);
foreach($array as $val) {
$name[$match[1]][] = $val;
}
}
}
}
?>
<h1>Course Registration</h1>
<form method=”post” action=”index.php”>
<fieldset><legend><strong>Student Information</strong></legend>
<dl>
<dt>Student Name:</dt>
<dd><input class=”inputbox” name=”studentname” type=”text” id=”studentname” value=”<?php echo $studentname;?>” required autofocus placeholder=”Please enter your first and last name” tabindex=”10″ size=”50″></dd>
<br>
<br>
<dt>Student Number:</dt>
<dd><input class=”inputbox” name=”studentnumber” type=”text” id=”studentnumber” value=”<?php echo $studentnumber;?>” required placeholder=”Please enter using the following format: PX-03-046″ tabindex=”20″ size=”50″></dd>
</dl>
<br>
</fieldset>
<br>
<fieldset><legend><strong>Course Selection</strong></legend>
<br>
Select a Course:<select name=”courses” tabindex=”30″>n”;
<option value=”-1″ >Available Courses…</option>
<?php
while(($fields = fgetcsv($in, null, ‘:’)) != false) {
if (count($fields) > 1) {
echo ”
<option value=”$fields[1]”>$fields[0] $fields[1]</option>”;
}
}
?>
</select>
<br>
<br>
<br>
<br>
<br>
<br>
</fieldset>
<div>
<p>
<input name=”reset” type=”reset” tabindex=”40″ value=”Clear Form” class=”btn”>
<input name=”submit” type=”submit” tabindex=”50″ value=”Submit Form” class=”btn”>
</p>
</div>
</form>
</body>
</html>
[ATTACH]17047[/ATTACH]
Thank you
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0
@NogDogMar 11.2016 — #In the spirit of divide and conquer, let's look at the validation of the student name and number. We can use the same sort of file parsing as we did for the course data. This time, let's put it all into a function, so that we can keep it separated from the main flow, and also have something that could easily be re-used anywhere you need to do that validation.[code=php]
<?php
/**
* Validate student name/number against text file
*
* @param string $studentName
* @param string $studentNumber
* @return bool
*/
function validateStudent($studentName, $studentNumber)
{
$found = false;
$fh = fopen('student.txt', 'r');
while(($line = fgetcsv($fh, null, ':')) != false) {
if(count($line) > 1) {
if($line[0] == $studentName and $line[1] == $studentNumber) {
$found = true;
break;
}
}
}
return $found;
}
// let's try it out (this is just to test the function)
$testData = array(
array('name' => 'NogDog', 'number' => 'ABC-123'),
array('name' => '', 'number' => ''),
array('name' => 'Kitty Softpaws', 'number' => 'DW-07-201')
);
echo '<pre>';
foreach($testData as $student) {
echo "Name: '{$student['name']}', Number: '{$student['number']}' = ";
if(validateStudent($student['name'], $student['number'])) {
echo "VALIDn";
}
else {
echo "INVALIDn";
}
}
echo '</pre>';
[/code]The test section at the end outputs:
<i>
</i>Name: 'NogDog', Number: 'ABC-123' = INVALID
Name: '', Number: '' = INVALID
Name: 'Kitty Softpaws', Number: 'DW-07-201' = VALID
Where I used $student['name'] and $student['number'] in the test, you'd actually use the values from the form: $_POST['studentname'] and $_POST['studentnumber'] where/when you want to actually validate those inputs. The nice thing about this is that the function definition can be anywhere within the file (just not inside any kind of conditional or loop block), so you can keep it out of the way of the main flow of the script.
0
@NogDogMar 13.2016 — #Your if condition tests if the variables are set, but not if they are valid. Youu could add an "and" to the condition:[code=php]
if( isset($_POST[$studentname], $_POST[$studentnumber]) and
validateStudent($_POST['studentname'], $_POST['studentnumber'])) {
// good
}
else {
// bad
}
[/code]0
@NogDogMar 13.2016 — #Nope, I was referencing this code:[code=php]
if (isset ($_POST[$studentname], $_POST[$studentnumber])) {
validateStudent($_POST['studentname'], $_POST['studentnumber']);
echo "Student name and number is valid.n";
}
else {
echo '<p style="color: red; text-align: center; font-size: 15px; font-weight: bold;">**The information you have entered is not valid. Please enter your information again.**</p>';
}
[/code]As written, the if() only checks if the input values are set. Within the block of code that gets executed if the if() is true, you call the validation function, but don't actually do anything with it, so it serves no actual purpose. Moving the call to the validation function into the if() condition makes it actually help determine what happens (the if block only gets executed if the variables are set AND then they pass validation).