PHP Code Analysis

echo Join ('-', $_get), '
';  ① $dict = Array (' area ' = = Array (  ' inland ', ' RTHK '),  ' type ' = = Array (' Action ', ' Love '),  ' year ' = = Array (' 2001 ', ), foreach ($dict as $key = = $item) {  $param = $_get;                 ②  foreach ($item as $v) {    $param [$key] = $v;             ③    $t = Http_build_query ($param);//④    echo "$v";  }  Echo '
';}

What is the meaning of ① sentence?
Do you have a special intention to assign a get to the ② clause? Is it good to use it directly?
What does ③ mean?
What does the ④ sentence mean, because it feels like the third sentence doesn't make any sense ... Thank you

Reply to discussion (solution)

Has your program been saved as search.php?

Saved, and now don't understand how your code is implemented,

The entire code is for the output $dict describe the 3 parameters of a different combination of links, a total of 6, each link on the basis of the current request parameters, only modify one of the parameters

1. Output the current request parameter $_get on the page
2. To modify the $param later, the direct use of $_get causes the second start of the $dict cycle, and some parameters are modified
3. Modify one of the parameter values, for example, to change the area to inland, or type to love
4. URL address after generating the modified parameter

