Question

这个问题是基于我之前的问题。这是我的代码。

$this->logger->debug($datauser);   // [ZN1961] => Array([#A] => 12 >  4 [#B] => 12 >  2 ), [ZN1962] => Array ([#A] => 20 >  4 [#B] => 20  >  2 )
logicexpression = ((#A) OR (#B) );

$newArr = array();
foreach ($datauser as $key => $value) {
    foreach ($value as $logname => $cond) {
        $this->logger->debug($cond);     /// WHEN DEBEG HERE it gives correctly the $cond in each iteration          
        $logicexpression =str_replace($logname, $cond, $logicexpression);
    }
$this->logger->debug($logicexpression ); // here I am always getting (12 >  4) OR (12 >  2)
    }
`

所以我的问题就像我在代码中提到的那样（12> 4）或（12> 2）。
所以输出是，

@547,12 >  4
@547, 12 >  2
@557, (12 >  4) OR (12 >  2)
@547, 20 >  4
@547, 20 >  2
@557, (12 >  4) OR (12 >  2) // here it should has to come as (20 >  4) OR (20 >  2)`

即使我正在调试$cond，调试也无法在迭代中替换相关的$cond。我无法理解为什么？请帮我。

Answer 1

你必须在迭代中定义一个新变量（$ newlogicexpression），否则在第一次迭代之后你不再在$ logicexpression中有（（#A）OR（#B））并且替换将不起作用...

$logicexpression = ((#A) OR (#B) );
foreach ($datauser as $key => $value) {
    $newlogicexpression = $logicexpression;
    foreach ($value as $logname => $cond) {
        $newlogicexpression = str_replace($logname, $cond, $newlogicexpression);
    }
    $this->logger->debug($newlogicexpression);
}

string_replace替换循环

1 个答案: