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如果声明在我的代码中不起作用。 变量未经测试[关闭]

分类: 技术问答 • 2022-04-08 19:08:49
问题描述：

In PHP I have used:

if($a=="no" or $curriculum=="yes")

Do you find anything wrong with that if statement?

It displays the contents of if even when $a = yes and $curriculum = no.. I have done enough checks to check whether the variables have the correct value.. Please help!!

在PHP中，我使用过： p> 

  if（$ a  ==“no”或$ curriculum ==“yes”）
  code>  pre> 
 
 
您是否发现 if  code>语句有什么问题？  p> 
 
 
它显示 if  code>的内容，即使 $ a = yes  code>和 $ curriculum = no  code> .. \ 我已经做了足够的检查来检查变量是否具有正确的值.. 
请帮助!!  p> 
  div>

答

you can try this

if($a=="no" || $curriculum=="yes")

答

Alright, here are some tests. Your if statement is fine ( or works as well as || does in this case )

$a = 'abc';
$curriculum = 'abc';
if($a == "no" or $curriculum == "yes") {
    echo 'Either $a equals "no" or $curriculum equals "yes"<br>'.PHP_EOL;
} else {
    echo 'Neither $a equals "no" nor does $curriculum equal "yes"<br>'.PHP_EOL;
}

$a = 'no';
$curriculum = 'abc';
if($a == "no" or $curriculum == "yes") {
    echo 'Either $a equals "no" or $curriculum equals "yes"<br>'.PHP_EOL;
} else {
    echo 'Neither $a equals "no" nor does $curriculum equal "yes"<br>'.PHP_EOL;
}

$a = 'abc';
$curriculum = 'yes';
if($a == "no" or $curriculum == "yes") {
    echo 'Either $a equals "no" or $curriculum equals "yes"<br>'.PHP_EOL;
} else {
    echo 'Neither $a equals "no" nor does $curriculum equal "yes"<br>'.PHP_EOL;
}

These result in:

Neither $a equals "no" nor does $curriculum equal "yes"
Either $a equals "no" or $curriculum equals "yes"
Either $a equals "no" or $curriculum equals "yes"

Please do a var_dump of both variables right before the if statement and show us the results:

var_dump($a);
var_dump($curriculum);
if($a == "no" or $curriculum == "yes") {

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