[SOLVED] how to call a user-defined function from another PHP script?

[peteschulte]

Hello Coders,

How do I call a function which I have defined in one PHP script from another PHP script? In the past I've used OSCommerce where this is done.

 

Quite a bit of time researching on php.net and in "Learning PHP 5" has only enabled me to use Include() for a file to ACT AS a function.

vars.php

<?php
$color = 'green';
$fruit = 'apple';
?>

 

test.php

<?php
echo "A $color $fruit"; // A
include 'vars.php';
echo "A $color $fruit"; // A green apple
?>

 

If my included file has a function definition in it, I can't call that function by name. Maybe include() isn't what I need. I read that require() acts the same except causes a fatal error if it fails.

 

In the following, I commented out the long function which I would like to use, multipurpose(). Then I used the top five lines as an include(), same as the quoted example from php.net. The commented code in Multipurpose() works fine as a php script when started with three $_REQUEST statements -- whereas I want to pass parameters to it as a function. Thanks in advance!

 

<?php
if (is_numeric($operand1) && is_numeric($operand2)){ 
		$result = $operand1 + $operand2;
//				echo $result;
}
return $result;

/*
//function Multipurpose(operation, operand1, operand2){
$operation = operation;
$operand1 = operand1;
$operand2 = operand2;

$change = 'Y';
//if (is_numeric($operand1)) $operand1type= 'NUM';
//if (is_numeric($operand2)) $operand2type= 'NUM';
//echo "|" . $operand1type . "|" . $operand2type . "|" ;
//if empty($operand1) $operand1 = 0;
if (empty($operand2) and $operation == "MUL") $operand2 = 0;
if (empty($operand1) and $operation == "ADD") $operand1 = 0;
if (empty($operand2) and $operation == "ADD") $operand2 = 0;
//echo "|" . $operand1 . "|" . $operand2 . "|" ;

if (is_numeric($operand1) && is_numeric($operand2)){ 
	switch ($operation) {
	case "ADD":
		$result = $operand1 + $operand2;
		break;
	case "SUB":
		$result = $operand1 - $operand2;
		break;
	case "MUL":
		$result = $operand1 * $operand2;
		break;	
	case "DIV":
		$result = $operand1 / $operand2;
		break;	
	case "PCT":
		$result = ($operand1 / $operand2)*100;
		break;	
	case "MAX":
		if($operand1 >= $operand2){
			$result = $operand1;
		} else {
			$result = $operand2;
		}
		break;		
	case "MIN":
		if($operand1 <= $operand2){
			$result = $operand1;
		} else {
			$result = $operand2;
		}
		break;		
	case "EMP":
		if (empty($operand2)){
			$result = $operand1;
			$change = 'N';
		} else {
			$result = $operand2;
			$change = 'N';
		}
		break;
	case "CON":
		$change = 'N';
		$result = $operand1.$operand2;
		break;
	default:
		$change = 'N';
		$result = "***bad operation request - '$operation' ";	
	}
// echo  $operand1 . " " . $operation . " " . $operand2 . " Result: " . $result . "<br>\n";
} else {
	$change = 'N';
	switch ($operation) {
	case "EMP":
		if (empty($operand2)){
			$result = $operand1;
		} else {
			$result = $operand2;
		}
		break;
	case "CON":
		$result = $operand1.$operand2;
		break;

	case "FOR":
		$i = 0;
		$j = 0;
		$result = "";
		while (strlen($operand1) > $i) {
			if ($operand2[$j] == "|") 
				{
				$result = $result . $operand1[$i];
				$j ++ ;
				$i ++ ;
				} 
			  else 
				{
				$result = $result . $operand2[$j];
				$j ++ ;	
				}
			if (strlen($operand2) == $j) $j = 0;			
		}
		while (strlen($operand2) > $j) {
			if ($operand2[$j] <> "|") $result = $result . $operand2[$j];
			$j ++ ;	
		}

		break;
	case "CHK":
		if(!check_cc($operand1) OR strlen($operand1)<15){
			$result = 'INVALID';	// give an error message
		}else{
			$result = 'OK';			// continue with processing
		}
		break;
	default:
		$result = "***unknown operation OR operand 1 and 2 need to be numeric for '$operation' ";
	}	
}
if ($change == 'Y'){
	$return = number_format($result, 2, '.', '');
} else {
	$return = $result;
}
//echo $result;
echo $return;

return $return;
//}
// end Multipurpose function
*/
?>

:

 

EDITED BY WILDTEEN88: Please use code tags (

) when posting code

[JonnoTheDev]

If you are including the file where the function resides then you should have no problem calling it.

 

i.e.

 

functions.php

===========

function helloWorld() {
return "Hello World";
}

 

 

index.php

===========

include('functions.php');
print helloWorld();

 

[peteschulte]

Thank you Neil. :-)

This looks like what I did, but I will use your format with a function with parameters which returns something to print.

[peteschulte]

As usual, it was about single quotes and quotation marks, in this case where I took the params which had been coming as HTTP requests.

Thanks!