php-如何在多维数组中同时检查空数组和键没有值

问题描述：

$marks=array( 
            "mohammad" => array (
               "physics" => array([0]=>35,[1]=>45)
               "maths" => 30,   
               "chemistry" => 39
            ),

            "qadir" => array (
               "physics" => array(),
               "maths" => 32,
               "chemistry" => 29
            ),

            "zara" => array (
               "physics" => array([0]=>),
               "maths" => 22,
               "chemistry" => 39
            )
         );

In the above array, "physics" element has array of values in "mohammad",empty array in "qadir" and in "Zara" it has index [0] with no value.

How can we check for "physics" is empty array or empty value for first index?

I have tried in if loop like below:

$name ='qadir'
if(!empty($marks[$name]['physics'])){//do here}

The above code working fine for 'qadir' but not for 'Zara'.I wish to check both cases at the same time.

Please suggest your thoughts.

  $ marks = array（
“mohammad”=＆gt; array（
“physics”=  ＆gt; array（[0] =＆gt; 35，[1] =＆gt; 45）
“maths”=＆gt; 30，
“化学”=＆gt; 39 
），
 
“qadir”  =＆gt;数组（
“physics”=＆gt; array（），
“maths”=＆gt; 32，
“化学”=＆gt; 29 
），
 
“zara”=＆gt; 数组（
“physics”=＆gt;数组（[0] =＆gt;），
“数学”=＆gt; 22，
“化学”=＆gt; 39 
）
）; 
   code>  pre> 
 
 在上面的数组中，“physics”元素在“mohammad”中有值数组，在“qadir”中有空数组，在“Zara”中它有索引[0]没有 值。 p> 
 
 
我们如何检查“physics”是第一个索引的空数组还是空值？ p> 
 
 
我试过if循环如下 ： p> 
 
 
  $ name ='qadir'
if（！empty（$ marks [$ name] ['physics']））{// do here} 
  代码>  p  re> 
 
 以上代码适用于'qadir'，但不适用于'Zara'。我希望同时检查这两种情况。 p> 
 
 
请建议您的 想法。 p> 
  div>

答

Use array_filter(). This will remove any empty values from the array which will check the empty condition correctly. Something like:

$filteredArray = array_filter($marks[$name]['physics']);
if(!empty($filteredArray)) {//do here}

答

Try this:

if (!empty($marks[$name]['physics']) || !isset($marks[$name]['physics'][0])) {

答

Use bellow code for null check in array

if(!empty($marks[$name]['physics']){
   if(!in_array(null, $haystack, true)){
     //do here
   }
}

php-如何在多维数组中同时检查空数组和键没有值

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