Creating Your Own “Function”
A function is a block of code that can be executed whenever we need it.
Creating PHP functions:
* All functions start with the word “function()”
* Name the function – It should be possible to understand what the function does by its name. The name can start with a letter or underscore (not a number)
* Add a “{” – The function code starts after the opening curly brace
* Insert the function code
* Add a “}” – The function is finished by a closing curly brace
Example
A simple function that writes my name when it is called:
<html>
<body><?php
function writeMyName()
{
echo “Michelle”;
}writeMyName();
?></body>
</html>
Use a PHP Function
Now we will use the function in a PHP script:
<html>
<body><?php
function writeMyName()
{
echo “Michelle”;
}echo “Hello world!<br />”;
echo “My name is “;
writeMyName();
echo “.<br />That’s right, “;
writeMyName();
echo ” is my name.”;
?></body>
</html>
The output of the code above will be:
Hello world!
My name is Michelle.
That’s right, Michelle is my name.