How to save input form data as an array in PHP
Question
I have a form which takes a student name, subject and age. When submitted, it saves the data as an array in txt file. Next time, when I put new data and submit it, it creates a new array in that txt file instead of appending it to the previous array.
<?php
if(!empty($_GET)){
$student = [];
$student['name'] = $_GET['name'];
$student['subject'] = $_GET['subject'];
$student['age'] = $_GET['age'];
$studentArray = [];
array_push($studentArray, $student);
$str = print_r($studentArray, true);
file_put_contents('student.txt', $str, FILE_APPEND);
}
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<form action="" method="GET">
<label for="name">Name:</label>
<input type="text" name="name" id="name">
<label for="name">Subject:</label>
<input type="text" name="subject" id="subject">
<label for="name">Age:</label>
<input type="number" name="age" id="age">
<input type="submit" name="submitButton">
</form>
</body>
</html>
output looks like this:
however I want to save it like below:
How could I do that?
2 answers
solution1
2 2020-10-24 14:23:32
If you really have to see your nice array in text use this:
if(!empty($_GET)){
$student = array();
$int = 0;
$txtfile = "student.txt";
if (file_exists($txtfile)) {
$fgc = file_get_contents($txtfile);
$expl = explode("[".$int."] => Array", $fgc);
while (count($expl) > 1) {
$expl2 = (count($expl) > 1) ? explode("[".($int+1)."] => Array", $expl[1])[0] : $expl[1];
$m = preg_match_all("@\\[([\d\w]+)\\] => ([^\n]*)@imus", $expl2, $matches);
if ($m == 0) { break; }
foreach ($matches[1] as $key => $val) {
$student[$int][$val] = $matches[2][$key];
}
$int++;
$expl = explode("[".$int."] => Array", $fgc);
}
}
$student[$int]['name'] = $_GET['name'];
$student[$int]['subject'] = $_GET['subject'];
$student[$int]['age'] = $_GET['age'];
$str = print_r($student, true);
file_put_contents('student.txt', $str);
print_r($student);
}
But please use a serialized version like this:
if(!empty($_GET)){
$student = array();
$int = 0;
$txtfile = "student.txt";
if (file_exists($txtfile)) {
$fgc = file_get_contents($txtfile);
$student = unserialize($fgc);
$int = count($student);
}
$student[$int]['name'] = $_GET['name'];
$student[$int]['subject'] = $_GET['subject'];
$student[$int]['age'] = $_GET['age'];
file_put_contents('student.txt', serialize($student));
print_r($student);
}
print_r for debug only.
Have fun ;)
solution2
0 2020-10-24 12:25:24
You have to use JSON in order to update your array constantly. the important point is you have to load your students in a variable and then push the new student to that variable so, in the end, you can save your students variable which contains all students in one array like you want.
Requirements to make this code works:
- Create a file named student.json and put
[]inside the file
Also, I highly suggest go and learn about JSON in PHP so you can have a better understanding of how this code is working now
if(!empty($_GET)){
$student = [];
$student['name'] = $_GET['name'];
$student['subject'] = $_GET['subject'];
$student['age'] = $_GET['age'];
$studentArray = json_decode( file_get_contents('student.json'), true);
array_push($studentArray, $student);
$str = print_r($studentArray, true);
file_put_contents('student.json', json_encode($studentArray));
}
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