I am trying to add a form field with custom telephone number input control. I used the example of the phone from https://material.angular.io/components/form-field/examples. Here is the code: example-tel-input-example.html But I get the following error: ERROR Error: mat-form-field must contain a MatFormFieldControl.
The best solution for me is to use the default <button> tag instead. Since typical button styling is not being applied (in my case I am using Primefaces), I set it manually. Here’s the whole result:
Let’s suppose I have the following PHP code which attempts to read from an array called $arr which takes on the values {fullname, studentnumber, email}. Upon submission of my HTML form, this PHP code will execute the foreach loop, and store the values posted to the page in the $_SESSION array. The above code doesn’t work as intended. If I … Read more
You should avoid using refs, you can do it with onChange function. On every change, update the state for the changed field. Then you can easily check if that field is empty or whatever else you want. You could do something as follows : In this example I did the validation only for email and name, but … Read more
Assuming you only copy/pasted the relevant code and your form includes <form method=”POST”> If _POST is not set the filename variable won’t be either in the above example. An alternative way: In this example filename is set regardless of the situation with _POST. This should demonstrate the use of isset nicely. More information here: http://php.net/manual/en/function.isset.php
& is HTML for “Start of a character reference”. & is the character reference for “An ampersand”. ¤t; is not a standard character reference and so is an error (browsers may try to perform error recovery but you should not depend on this). If you used a character reference for a real character (e.g. ™) … Read more
When you post forms with php, or any other data, you may come back to the page and find a message in the browser like “Document Expired” or “Confirm Form Resubmission With Chrome”. These messages are a safety precaution the browser uses with sensitive data such as post variables. The browser will not automatically give … Read more