All usable statements in PHP can cause a function to be executed - however, that's not to say that every statement will execute a function. A statement is defined by the programmer, who it is ultimately the one responsible for including a function, more than one function, or no functions.
There must be a statement in the file which calls the function
A php script can only be executed within a Web server that runs php.
Of course it is possible to call a PHP-function inside an echo statement. The function will be executed and returns a value. This value then is used in the echo statement. For example: echo "Ferengi-Rule #1: ", ferengi_rule(1), "\n"; echo "Random: ", ferengi_rule(0), "\n"; function ferengi_rule($number) { $rules = array( 1 => "Once you have their money, never give it back.", 2 => "You can't cheat an honest customer, but it never hurts to try.", 3 => "Never buy anything for more than is absolutely necessary.", 4 => "Sex and profit are the two things that never last long enough." // ... ); if( isset($rules[$number]) ) { return $rules[$number]; } else { return array_rand($rules); } }
In Drupal, you can include a PHP file in a page callback by using the include or require statement within your custom page callback function. First, define the callback function in your module, and then use the include statement to include the desired PHP file. Make sure the file path is correct and accessible. Finally, register the page callback in your module's hook_menu or routing system, depending on the Drupal version you are using.
in php used for one typ website
we cant use set timeout function in php because it is of java script function
Below is a simple example of how you could return a value in a PHP function. <?php function returnme($value) { return $value; } echo returnme('hello'); // outputs: hello ?>
function function_name() { .................... }
The eval() function evaluates a string as PHP code. http://us.php.net/manual/en/function.eval.php
A simple function call <html> <body> <?php if(isset($_POST['button'])) { setValue(); // Function is called } function setValue() { echo "<br>The button property to call PHP function works"; // Your code here } ?> <input type="submit" name="button" onclick=<?php $_SERVER['PHP_SELF']; ?> /> </body> </head>
Once you install wamp server. Any file with php extenstion like xyz.php you put in www folder will be executed as PHP file.
The two functions are used to insert the content of a file into another PHP file before it is executed by the server. They are identical in every aspect, but they perform error handling in different ways. The include() function generates a warning (which does not halt execution) while the require() function generates a fatal error (which stops execution immediately).