How many types of validation are there in php?
Show Introduction to Validation in PHPValidation in PHP is the process where we check if the input information in the various fields in any form such as text, checkbox or radio button, etc, submitted by the end-user in the form is correct or not using HTML code. There are 2 kinds of validation available in PHP:
Rules to Validation in PHPThere are certain rules for validation of a form and they are as follows for the following fields:
Types of Validation in PHPNow let us see how to validate different types of such fields. 1. Validation of text fieldsThere are a few text fields from the above-said attributes such as name, email, website, and comment. The HTML code for the same is as below: Code:
Output: Explanation to the above program: Here we can customize these attribute names however we want by using different header tags and also space tags. We have shown one of the paragraph format options for this one here. 2. Validation of radio buttonsRadio buttons are basically the ones having boolean value either true or false and they are represented by a circular box kind of a thing. If the box is circled it means true and vice versa. Let us check out the HTML code to implement the same for above said “Gender” attribute. Code:
Output: Explanation to the above program: By using this code we are displaying 3 options under the gender category as male, female and other. The user can circle on the required option by clicking on the circle and the option will be saved and validated. 3. Validation of form elementThis method is used at the end after all the required details have been filled to submit the form. On using this HTML code the form data when submitted is sent with the “post” method. There are basically 2 attributes we need to specify while validating form element: action and method. We can convert certain HTML attributes to their respective entity names in order to prevent the form breaking when the user submits. “action” determines where the data of the form is sent on submission and “method” defines how the form’s data is submitted. Code:
Let us check an entire form of validation by combining all the different kinds of validation we learned above: Code:
Output: Explanation to the above program: In the above example, we have combined all the different fields available such as text field, radio buttons and also email format types. The output will be displayed in the form of a box which will be according to the specification we give in the HTML code. Upon entering the mandatory values, the same are displayed under the text “The details entered are:”. Suppose any one of the mandatory values is not given then it will throw an error message besides that particular attribute saying that it is mandatory and needs to be filled. Advantages of Validation in PHP
ConclusionWe have seen in this tutorial how to do validation in PHP on the client-side and how much it is essential. It helps in saving time hence allowing for more bandwidth to point out the end-user their mistake in filling the given form. However, server-side validation is also important which is done using JavaScript, etc. Hence we can finally conclude by saying that both client and server-side validations are important since they complement each other in serving the end purpose. Recommended ArticlesThis is a guide to Validation in PHP. Here we discuss certain rules for validation, types, and advantages along with respective examples. You can also go through our other related articles to learn more –
Which are the types of validation in PHP?PHP validates the data at the server-side, which is submitted by HTML form.. Empty String.. Validate String.. Validate Numbers.. Validate Email.. Validate URL.. Input length.. What are the different validation types?There are 4 main types of validation:. Prospective Validation.. Concurrent Validation.. Retrospective Validation.. Revalidation (Periodic and After Change). How many data validation types are there?Data validation options. When a data validation rule is created, there are eight options available to validate user input: Any Value - no validation is performed.
What is form validation in PHP?Form Validation is a necessary process before the data entered in the form is submitted to the database. This is done to avoid unnecessary errors. In PHP Form validation, the script checks for data in respective fields based on the rules set by the developer, and returns an error if it does not meet the requirements.
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