Get value of selected option with php

When a form is submitted to a PHP script, the information from that form is automatically made available to the script. There are few ways to access this information, for example:. Example 1 A simple HTML form. As of PHP 5. Currently available methods are listed below:.

Example 2 Accessing data from a simple POST HTML form. There were some other ways of accessing user input in old PHP versions.

PHP: Get Value of Select Option and Radio Button | FormGet

These are listed below. See changelog at the bottom of the page for more details. Example 3 Old methods of accessing user input. Using a GET form is similar except you'll use the appropriate GET predefined variable instead. So, for example, http: Dots and spaces in variable names are converted to underscores.

PHP also understands arrays in the context of form variables see the related faq. You may, for example, group related variables together, or use this feature to retrieve values from a multiple select input. For example, let's post a form to itself and upon submission display the data:.

Example 4 More complex form variables. When submitting a form, it is possible to use an image instead of the standard submit button with a tag like:. These contain the coordinates of the user click within the image. The experienced may note that the actual variable names sent by the browser contains a period rather than an underscore, but PHP converts the period to an underscore automatically.

Cookies are a mechanism for storing data in the remote browser and thus tracking or identifying return users.

You can set cookies using the setcookie function. Cookies are part of the HTTP header, so the SetCookie function must be called before any output is sent to the browser. This is the same restriction as for the header function.

See the setcookie manual page for more details and examples. If you wish to assign multiple values to a single cookie variable, you may assign it as an array. That will create two separate cookies although MyCookie will now be a single array in your script. If you want to set just one cookie with multiple values, consider using serialize or explode on the value first. Note that a cookie will replace a previous cookie by the same name in your browser unless the path or domain is different.

So, for a shopping cart application you may want to keep a counter and pass this along. Example 5 A setcookie example. Typically, PHP does not alter the names of variables when they are passed into a script. However, it should be noted that the dot period, full stop is not a valid character in a PHP variable name. For the reason, look at it: Obviously, this doesn't have the intended result.

For this reason, it is important to note that PHP will automatically replace any dots in incoming variable names with underscores.

How To Get The Select Value From The Drop Down List? - PHP | yyizibily.web.fc2.com

Because PHP determines the types of variables and converts them generally as needed, it is not always obvious what type a given variable is at any one time. PHP includes several functions which find out what type a variable is, such as: See also the chapter on Types. Getting Started Introduction A simple tutorial Language Reference Basic syntax Types Variables Constants Expressions Operators Control Structures Functions Classes and Objects Namespaces Errors Exceptions Generators References Explained Predefined Variables Predefined Exceptions Predefined Interfaces and Classes Context options and parameters Supported Protocols and Wrappers Security Introduction General considerations Installed as CGI binary Installed as an Apache module Session Security Filesystem Security Database Security Error Reporting Using Register Globals User Submitted Data Magic Quotes Hiding PHP Keeping Current Features HTTP authentication with PHP Cookies Sessions Dealing with XForms Handling file uploads Using remote files Connection handling Persistent Database Connections Safe Mode Command line usage Garbage Collection DTrace Dynamic Tracing Function Reference Affecting PHP's Behaviour Audio Formats Manipulation Authentication Services Command Line Specific Extensions Compression and Archive Extensions Credit Card Processing Cryptography Extensions Database Extensions Date and Time Related Extensions File System Related Extensions Human Language and Character Encoding Support Image Processing and Generation Mail Related Extensions Mathematical Extensions Non-Text MIME Output Process Control Extensions Other 10 minutes best binary options ea strategy Extensions Other Services Search Engine Extensions Server Specific Extensions Session Extensions Get value of selected option with php Processing Variable and Type Related Extensions Web Services Windows Only Extensions XML Manipulation GUI Extensions Keyboard Shortcuts?

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Variables From External Sources HTML Forms GET and POST When a form is submitted to a PHP script, the information from that form is automatically made available to the script.

There are charmin toilet paper stock market ways to access this information, for example: IMAGE SUBMIT variable names When submitting a form, it is possible to hot uk stocks to buy an image instead of the standard submit button with a tag like: Dots in incoming variable names Typically, PHP does not alter the names of variables when they are passed into a script.

Determining variable types Because PHP determines the types of variables and converts them generally as needed, it is not always obvious what type a given variable is at any one time.

Changelog Version Description 5. This post is with regards to handling forms that have more than one submit button. Suppose we have an HTML get value of selected option with php with a submit button specified like this: This works fine, except when we want to pass more information with the click of this particular button.

Get Value or Selected Option in Select Box Using JavaScript

Imagine a scenario where you're dealing with user management in some administrative interface. You are presented with a list of user names queried from a database and wish to add a "Delete" and "Modify" button next to each of the names in the list. Naturally the 'value' of our buttons in the HTML form prom dress shops wigan we want to display will be "Delete" and "Modify" since that's what we want to appear on the buttons' faceplates.

In other words, the 'name' of the buttons along cannot carry any uniquely identifying information if we want to process them systematically after submit. Since these buttons will exist for every user in the list, we need some further way to distinguish them, so that we know for which user one of the buttons has been pressed. Using arrays is the way to go. Our HTML code to display the buttons will become: Then when we handle this form in PHP we need to do the following to extract both the 'value' of the button "Delete" or "Modify" and the unique numerical identifier of the user we wish to affect in this case.

The following will print either "Modify" or "Delete", as well as the unique number of the user: If we wish to protect the unique numerical identifier, we must use some other uniquely identifying attribute of each user. Possibly that attribute should be encrypted when output into the form for greater security. If the attribute is specified, its value must not be the empty string.

Any non-empty value for name is allowed. To handle forms with or without [] you can do something like this: If you want to access this in Javascript you should assign an id attribute to the select box as well as the name attribute.

Then proceed to use the id attribute in Javascript to reference the select box and the name attribute to reference the select box in PHP. For what I understand, since PHP 4. A group of identically-named checkbox form elements returning an array is a pretty standard feature of HTML forms. It would seem that, if the only way to get it to work is a non-HTML-standard-compliant workaround, it's a problem with PHP. Since the array is passed in the header in a post, or the URL in a get, it's the PHP interpretation of those values that's failing.

When you are using checkboxes to submit multiple choices, there is no need to use the complex method further down the page where you assign a unique name to each checkbox. Instead, just name each checkbox as the same array, e.

For anyone else having trouble figuring out how to access values in a SELECT element from a POST or GET form, you can't set the "id" attribute to the same thing as your "name" attribute. Instead, either change the id or name attribute so that they are dissimilar. It took me quite some time to figure out the problem. Regarding image input buttons, above where it says: It will process any and all form data, prepending each variable with a unique identifier so you know which method was used to get the data.

My coding could be neater, but this sure makes processing forms much easier! As far as whether or not "[]" in name attributes goes, The HTML4. Leading and trailing whitespace may be trimmed and shouldn't be used.

This function takes a recurring form item from php: The fread maxes out at k on this one. I think '[' and ']' are valid characters for name attributes. CDATA is a sequence of characters from the document character set and may include character entities How to pass a numerically indexed array.

This is the part inside the form. PHP adds the index when it receives the post and it starts at 0. This function is a simple solution for getting the array of selectes from a checkbox list or a dropdown list out of the Querry String. I took an example posted earlier and simplified it.