386 votes

2 answers

How to echo a string of html from one page to another in PHP

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For instance, when the user submits a form, code from another .php file is executed and then the focus comes back to the previous page (the one with the form on it). Is it possible to send markup back to the first page from the .php file that handles the action?

I would like to send a message back to the user if there was a problem with their login, preferably without using JavaScript.

I'm assuming there's a simple solution for this that doesn't require assigning a string to $_SESSION, and then printing that on the other page, but I can't think of one.

Undefined asked

2021-12-1

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562

votes

Answer

Solution:

I would suggest this.

form.php post a value to calc.php

calc.php redirect user to form.php with the input value and the output value

form.php

if(isset($_GET['output_value'])){
    $input_value = $_GET['input_value'];    // get back some value from calc.php
    $output_value = $_GET['output_value'];  // get back some value from calc.php
    echo "Input value: " . $input_value . "<br>";
    echo "Output value: " . $output_value. "<br>";
}

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calc.php

$input_value = $_POST['input_value'];
$output_value = $input_value * $input_value;
header("Location: http://www.example.com/form.php?input_value=" . $input_value . "&output_value=" . $output_value); // redirect user to the first page with some values
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21

votes

Answer

Solution:

Basically this is handled with html attribute in tags or with javascript but they are not secure and can be edited best way is handled with all of them

Example :

// For Not Null
<input name="test" require> 

// Minimum Value Must Be Bigger Than 5 or equal 5
<input name="test" min="5"> 

// Maximum Value Must Be lowee Than 5 or equal 5
<input name="test" max="5">
<button type="submit">Submit</button>Copy code

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Date the issue was resolved:

2021-12-1

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About the technologies asked in this question

PHP

PHP (from the English Hypertext Preprocessor - hypertext preprocessor) is a scripting programming language for developing web applications. Supported by most hosting providers, it is one of the most popular tools for creating dynamic websites. The PHP scripting language has gained wide popularity due to its processing speed, simplicity, cross-platform, functionality and distribution of source codes under its own license.
https://www.php.net/

JavaScript

JavaScript is a multi-paradigm language that supports event-driven, functional, and mandatory (including object-oriented and prototype-based) programming types. Originally JavaScript was only used on the client side. JavaScript is now still used as a server-side programming language. To summarize, we can say that JavaScript is the language of the Internet.
https://www.javascript.com/

HTML

HTML (English "hyper text markup language" - hypertext markup language) is a special markup language that is used to create sites on the Internet. Browsers understand html perfectly and can interpret it in an understandable way. In general, any page on the site is html-code, which the browser translates into a user-friendly form. By the way, the code of any page is available to everyone.
https://www.w3.org/html/