My PEAR: The Beginning - Functions
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When making function calls, there should be no space between the name of the function and the opening parenthesis prior to its argument list. If there are no arguments to be passed, a blank list should be used by opening and then immediately closing parentheses. Take a look at this example:
<?php
function myfunction($num1,$num2){
//function adds two numbers
..statements here..
}
function nopars(){
//function does nothing in particular
..statements here..
}
$res = myFunction(5,10);
//function with no parameters
$answer =nopars();
?>
When declaring your own functions, the rules for braces in control structures are changed slightly. The starting brace for the block should begin on a new line, immediately after the function name and argument list definition. Take a look at the example function definition below:
function generatepassword()
{
//This function generates a 7 letter password
$chars = "1234567890abcdefGHIJKLMNOPQRSTUVWxyz
ABCDEFghijklmnopqrstuvwXYZ1234567890";
$thepass = '';
for($i=0;$i<7;$i++)
{
$thepass .= $chars{rand() % 39};
}
return $thepass;
}
A function should always return a result whether it is successful or not. Finally, PEAR does not, it seems, have any opinion on naming conventions. But generally(this is a personal observation) it looks like the name of the variable alludes to the contents of the variable itself. For example:
$mystrvar - holds a string variable.
$myintvar -- holds a number (integer).
In the next article we will look at how to install and use a PEAR package.
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