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The keyword used to define PHP functions is "function". The syntax structure it follows is: function function_name(parameter_list) { // Function body }, where function_name is the function name, parameter_list is the parameter list, and the function body contains the code for function execution.
Keywords that define functions in PHP
In PHP, function
keywords used to define functions. It is used with the following syntax:
<code>function function_name(parameter_list) { // 函数体 }</code>
where:
function_name
is the unique identifier of the function. parameter_list
is an optional parameter list that specifies the input the function receives. Function body
is the code block for function execution, which contains statements enclosed in curly braces. Example
Define a function that calculates the sum of two numbers:
<code class="php">function sum($a, $b) { return $a + $b; } $result = sum(5, 10); // 调用函数,传递参数 echo $result; // 15</code>
Key points
return
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