Scope of php array?

Question

The poster has done too much research, maybe the keyword description is incorrect and no corresponding explanation was found.

I will post the picture first:

That’s about it, why can print_r output, but there is no output in echo? Good people have a safe life, maybe I don’t understand the scope well...

Answer 1

each can traverse the array and then assign the array to a variable. Then the variable becomes an array. list can turn the elements of the default index array into variables such as $arr= range(1,3) list($a,$b,$c)=$arr echo $a,$b,$c is 1,2,3 That's probably what it means.

Answer 2

<hr size="5px" width="90%"/>
<?php
static $arr = array("张三","李四");
$name = each($arr);
print_r($name);echo '<br />';
$name = each($arr);
print_r($name);echo'<br />';
?>
<hr size="3pt" color="green"  width="50%" />
<?php
print_r($arr);
//$arr =array("张三","李四");
list($key, $value) = each($arr);
echo "$key=>$value";
?>

Attachment: The code of Figure 2.