PHP Manual
runkit 函数
Determines if the current functions return value will be used

runkit_return_value_used

(PECL runkit >= 0.8.0)

runkit_return_value_used — Determines if the current functions return value will be used

说明

runkit_return_value_used ( void ) : bool

返回值

Returns TRUE if the function's return value is used by the calling scope, otherwise FALSE

范例

Example #1 runkit_return_value_used() example

 <?php
function foo() {
  var_dump(runkit_return_value_used());
}

foo();
$f = foo();
?>

以上例程会输出：

bool(false)
bool(true)

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