ReflectionGenerator::getTrace()函數是PHP中的內置函數,用於返回指定的當前正在執行的生成器的跟蹤。
用法:
array ReflectionGenerator::getTrace ( void )
參數:該函數不接受任何參數。
返回值:此函數返回指定的當前正在執行的生成器的跟蹤。
以下示例程序旨在說明PHP中的ReflectionGenerator::getTrace()函數:
程序_1:
<?php
// Initializing a user-defined class Company
class Company
{
public function GFG()
{
yield 0;
}
}
// Creating a generator 'A' on the above
// class Company
$A = (new Company)->GFG();
// Using ReflectionGenerator over the
// above generator 'A'
$B = new ReflectionGenerator($A);
// Calling the getTrace() function
$C = $B->getTrace();
// Getting the trace of the specified
// executing generator 'A'
var_dump($C);
?>
輸出:
array(0) { }
程序_2:
<?php
// Initializing a user-defined function
function Department1() {
yield 1;
}
function Department2()
{
yield from Department1();
}
function Department3()
{
yield from Department2();
}
// Creating a generator
$A = Department3();
// Starting the generator
$A->valid();
// Using ReflectionGenerator() over the
// above generator 'A'
$A = new ReflectionGenerator($A);
// Calling the getTrace() function
$B = $A->getTrace();
// Getting the the trace of the
// executing generator 'A'
var_dump($B);
?>
輸出:
array(2) { [0]=> array(4) { ["file"]=> string(42) "/home/5ae62f6794b195f5dfeff893639bead9.php" ["line"]=> int(10) ["function"]=> string(11) "Department1" ["args"]=> array(0) { } } [1]=> array(4) { ["file"]=> string(42) "/home/5ae62f6794b195f5dfeff893639bead9.php" ["line"]=> int(15) ["function"]=> string(11) "Department2" ["args"]=> array(0) { } } }
參考: https://www.php.net/manual/en/reflectiongenerator.gettrace.php
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注:本文由純淨天空篩選整理自Kanchan_Ray大神的英文原創作品 PHP | ReflectionGenerator getTrace() Function。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。