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javascript - Could a person parse a value from a php page to an external java script page?

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Solution:

Your echoed script has to be executed AFTER the element with the iduser has been parsed. You have multiple ways to achieve this.

1. Echo your script anywhere after you element with the iduser. - At best right before the</body> (common practice).

2. Let JS tell you, when the DOM has been loaded (place this JS whereever you like):

   window.addEventListener ('load', function () {
       setName("<?= $phpVariable ?>"); 
   });
   Copy code

Example:

<script>
    console.log('Test script-tag before');
    console.log(document.getElementById('selectMe'));
    
    window.addEventListener ('load', function () {
      console.log('Listen for load-event');
      console.log(document.getElementById('selectMe'));
    });
</script>

<div id='selectMe'>Select Me</div>

<script>
    console.log('Test script-tag after');
    console.log(document.getElementById('selectMe'));
</script>Copy code

Undefined asked

2023-09-26

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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/

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