How to pass parameters to PHP function?

Parameters can be passed to PHP functions by specifying values ​​when calling the function. The specific steps are as follows: Declare a function that accepts parameters. Specify parameter values ​​when the function is called. Parameter types can be primitive types, arrays, objects, or resources.

#How to pass parameters to PHP function?

PHP functions can receive values ​​and perform specific operations by passing parameters. Here's how to pass parameters to a function in PHP:

Function Declaration

First, you need to declare a function that accepts parameters. The syntax is as follows:

function function_name($parameter1, $parameter2, ...) {
  // 函数主体
}

Passing parameters

To pass parameters to a function, simply specify the value when the function is called:

function_name(value1, value2, ...);

Parameters Type

Parameters to PHP functions can be any type of data, including basic types (integers, floats, booleans, strings), arrays, objects, and resources.

Practical case: Calculate the sum of two numbers

The following example shows how to use parameters to pass two numbers to a PHP function and calculate their sum:

function sum($num1, $num2) {
  return $num1 + $num2;
}

$result = sum(10, 20);
echo $result; // 输出：30

Additional Tips

• The parameters are optional and you can specify default values.
• Parameters can be passed by reference (passing an address by reference) or by value (passing a copy).
• You can check the passed parameter values ​​by using the var_dump() or print_r() function.

In summary, by passing parameters, you can use PHP functions to process external data and perform various operations.

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