everyone. I write this code in my test php. Once I execute in browser, it's just display the initial, the first letter of array. For further, here is my code:
$args = array ('computer'=>'pentium', 'notebook'=>'atom', 'gadget'=>'tab');
foreach ($args as $key => $val)
{echo $key['val'];}
and the result in my browser is "cng" which I think c = computer, n = notebook, g = gadget.
so, would someone explain me how could it happens?
thanks in advance
分享 PHP is evaluating $key['val'] as $key[0] and giving you the first letter of each "key"
In your example, $key is not an array, it is a string containing computer, notebook or gadget for the respective iteration through $args. PHP evaluates 'val' as an integer because you are calling the array key syntax on a string.
From the PHP Documentation
Characters within strings may be accessed and modified by specifying the zero-based offset of the desired character after the string using square array brackets, as in $str[42]. Think of a string as an array of characters for this purpose. The functions substr() and substr_replace() can be used when you want to extract or replace more than 1 character.
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