HTML Forms

Forms are required when we want to collect data from the user. Html forms consists of different fields to take user inputs such as: input, text area, checkbox, password, radio button etc. Many languages are embedded with html forms to fully gain the potential use of it.

  • Html: Create forms with different fields to accept user data.
  • CSS: It enhances the style and presentation.
  • JavaScript: It provide validations for form inputs.
  • Server side languages: Like PHP. JAVA, .NET etc. different languages are used to process the data.
Syntax:
  1. <form attributes>
  2.     Form elements like: input, text area, checkbox, password, radio button
  3. </form>
Form Attributes:
  • action: It allows user data to be processed by running backend script.
  • method: It is used to upload data by 2 methods GET & POST.
  • target: It specify the target window where result is to be displayed.
  • enctype: It specifies the browser on how to encodes the data before it sends to the server.

HTML Form Controls

  • Input Controls: When user input the text then the text can be single line or multiple line thus we apply control.
  1. Single Line I/P Control: It is used when user required to enter only single line text as input such as in user name, search box etc. Syntax: <input>? tag.
  2. Multi Line I/P Control: When user details require multi-line or more than single line input. We use <textarea> tag.
<form>  
         First name: <input type = "text" name = "first_name" /><br>  
         Last name: <input type = "text" name = "last_name" /><br>  
<textarearowstextarearows = "5" cols = "50" name = "Description">  
            Enter description here...  
</textarea>  
</form>
Output:
First name: Last name: Enter description here...
  • Checkbox Control: It is used when user has to select more than one option i.e. multiple options.
Example: In case of Subject Selections, Song selection etc.
  1. <form>
  2. <input type = "checkbox" name = "maths" value = "on">Maths
  3. <input type = "checkbox" name = "physics" value = "on"> Physics
  4. </form>
Output:
Maths Physics

  • Radio Button Control: It is used when out of many option we have to select one options. It is a one to many relations. Example: In case of Gender selection etc.
<body>  
<form>  
<input type = "radio" name = "male" value = "male"> Male  
<input type = "radio" name = "female" value = "female"> Female  
</form>  
</body>
Output:
Male Female

  • Select Box Control: It is also known as drop down box where it provides a list and can select any single value from the list. Example: Selection of state, city etc.
<form>  
<select name = "dropdown">  
<option value = "State" selected>State</option>  
<option value = "Assam">Assam</option>  
<option value = "Bihar">Bihar</option>  
</select>  
</form>
Output:

  • Button Controls: Button controls are the integrated attribute of  tag with which we can create clickable buttons. Example: Submit button, Reset Button etc.
  1. <form>
  2. <input type = "submit" name = "submit" value = "Submit">
  3. <input type = "reset" name = "reset" value = "Reset">
  4. <input type = "button" name = "ok" value = "OK">
  5. </form>
Output:

  • File Upload Box: It allows user to upload file to some websites. It is also embedded with



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