Then variable “b” is created by assigning the NULL value. If the IF condition returns FALSE value then the ELSE condition’s statements will be printed.
It will print “The variable ‘a’ is now set”. If the IF condition of TRUE value then the statements inside the IF condition will be printed. It means the value is set for the variable a. Example #2Įxplanation: In the above example, a new variable “a” is created using with the value “10”. If the isset() function will return/print the value “FALSE” if the isset() returns FALSE value. Then an isset() function inside the IF condition is made to return the value TRUE or FALSE but here the variable “a” is defined so the output is obviously “TRUE”. Examples to implement isset() Function in PHPĮxplanation: In the above isset() program, a variable ‘a” is declared and also defined with the value “10”. From the PHP 5.4.0 version, non-numeric offsets of strings will return FALSE value/values. Isset() function also works by accepting the multiple variables/many variables etc. The variable of the isset() function can be unset using the unset() function. If the PHP isset() function are passed with the multiple variables then isset() will TRUE only if all the variables are set. The return type of the isset() function of PHP programming language is Boolean. The isset() function works from the PHP version 4.0. The isset() function works by returning the value TRUE if the $variable exists in the isset() function (isset() programming code) which has the value which is other than NULL value. : It is an optional value/values or variable/variables to check
These URLs are optimised for search engines, are a lot cleaner and easier for your visitors to understand.įinally to prevent search engines and visitors accessing the page content outside the template you need to prevent access to the directory they are being stored in. htaccess file in the same directory as your index.php file will change your hyperlinks from: Search engines don’t rank messy URL‘s as well as clean URL‘s so ideally we want to use Apaches rewrite rule to clean up our messy URL‘s. The problem with that is termed “messy URL‘s”. This method uses the URL to pass a variable to the server.
ALTERNATIVE TO ISSET PHP CODE
The content from the contact.html page is placed where you have placed the include code from above, if the file does not exist, main.html is used instead (this should be your homepage content). Within the coded template file you place the below code where you would like the content from the separate files to be placed: With the design stage finished, a single template page is coded and named index.php with the following code at the top of the file: This way if something was to be changed in the design it would require one change to the template, and not separate changes to all of the pages on the site. I wanted to be able to reuse my template and include the different content dynamically. The site I was developing had a static design, it had several pages, and the content for each page sat within the same area in the design.
It is very easy to use PHP Includes to separate content from design, you can just use a single line of PHP to include or require another file. This was the case in a recent project I undertook but I still wanted to use a single template. You may not want or be able to use a database or the clients budget might not stretch that far.
ALTERNATIVE TO ISSET PHP FULL
Sometimes a when you build a website using a full content management system is not always an option.
ALTERNATIVE TO ISSET PHP GENERATOR
It is recommended you use a static site generator such as Jekyll. It has been archived and will no longer be updated, comments are closed and the page is provided for reference purposes only. The contents of this article may be out of date.
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