Php Tutorial-example of form submission _ PHP Tutorial

Php example of form submission. For more information about how to submit a php Tutorial form for beginners, see. The following code creates a complex form. The code below is used to copy the form submission instance of a php Tutorial for a super simple beginner. if you need it, refer to it. The following code creates a complex form.

 
  
  

   

    
The code is as follows:
    
 
  
   
  
   

    
  
   
  
 
This form includes common form elements: single-line text box, multi-line text box, single option (radio), multi-option (checkbox), and multi-choice menu. The following is a detailed description.
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Maxlength is an attribute associated with the password text box. it limits the maximum length of a password to 10 characters.
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The age list box is a list menu with its own values under its naming attributes. Selected is a specific attribute selection element. If an option is attached with this attribute, this attribute is listed as the first item during display.
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The content in the intro text box displays text, row, and column width according to rows and cols.
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Fave_sport is a set of single-choice buttons (radio). we need to name the elements by group. for example, each group of single-choice buttons is named fave_sport. you can select only one, the sending script also has only one value.
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Like a single option, all multi-option members must have attributes of the same name, and the attribute name must be added with brackets []. in this way, the values of multiple options are sent to PHP in an array, ages is in this form.
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The checked tag refers to a value in a single option and multiple options. it is selected by default.

The Figure 5-3 in the form above is shown. -3 because the form in the preceding HTML uses the POST method to transmit data, the data submitted by the user is saved to the Super global array of $ _ POST or $ _ REQUEST, we can process submitted data based on the value in the $ _ POST array. Submit the data in the preceding form to the someform. php script. the processing logic of this script is as follows:

 
  
  

   

    
The code is as follows:
    
 
  
   
  
   

    
// Determine whether the variable name of the button is defined in $ _ POST. If yes, the form has been submitted.
If (isset ($ _ POST ["btn_submit"]) {
If (empty ($ _ POST ['username']) {
Echo "you have not entered the user name ";
Exit (0 );
}
If (empty ($ _ POST ['password']) {
Echo "you have not entered the password :";
Exit (0 );
}
Echo "Your username:". $ _ POST ['User _ name']."
";
Echo "your password (plaintext):". $ _ POST ['password']."
";
Echo "your age:". $ _ POST ['age']."
";
If (! Empty ($ _ POST ['ages ']) {
Echo "the language you selected is :";
// Process the array generated by the checkbox button of interest selected by the user
Foreach ($ _ POST ['ages '] as $ lang ){
Echo $ lang ."";
}
} Else {
Echo "you have not entered any interests ";
}
If (! Empty ($ _ POST ['develop _ ide ']) {
Echo "your development tool is :";
// Process the array generated by the menu of multiple development tools selected by the user
Foreach ($ _ POST ['develop _ ide '] as $ ide ){
Echo $ ide ."";
}
} Else {
Echo "you have not selected a development tool ";
}
Echo "your self-introduction:". nl2br ($ _ POST ['Intro'])."
"; // Nl2br (), insert the HTML line break (
)
";
Echo "webpage hidden value (passed through the hidden tag value):". $ _ POST ['from']."
";
}
?>
  
   
  
 

Bytes. The following code creates a complex form. The code is as follows...