php definition, traversal and deletion of arrays

This article mainly introduces the definition, traversal and deletion of arrays in PHP. Interested friends can refer to it. I hope it will be helpful to everyone.

The example of this article describes how PHP implements searching for one-dimensional array elements and deleting the corresponding elements of the two-dimensional array. The details are as follows:

Define a one-dimensional array and a two-dimensional array as follows

$fruit=array('apple','orange');
$products = array( array('name'=>'apple','price'=>23.4),
array('name'=>'orange','price'=>45.3),
array('name'=>'biscuit','number'=>5,'price'=>34)
);

It is necessary to find out whether the element in the $products array has an intersection with the $fruit element in the array. If so, keep it, otherwise delete it.

The implementation method is:

foreach($products as $key=>$value)
{
   if(!in_array($value["name"],$fruit))
   unset($products[$key]);
}
array_values($products);
//使用unset()销毁数组元素时候应注意索引问题最好使用array_values()给数组重新排序

Summary: The above is the entire content of this article, I hope it will be helpful to everyone's study.

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