PHP Operation Array Discussion

<? PHP

// 1. Determine whether a string exists in the Set
$ Namesarrays = array ("aaaaaaa", "bbbbbbbbbb", "cccccccccc", "ddddddddd ");
$ Lookingfor = "aaaaaaa ";
If (in_array ($ lookingfor, $ namesarrays ))
{
Echo "content! ";

} Else
{
Echo "no data ";
}
 
// 2. determine the number of elements in the array
$ COUNT = count ($ namesarrays );
Echo "number of sets:". $ count. "<br/> ";

// 3. add an element to the set. By default, the element is added to the end of the set
echo " 3. add elements to a collection
";
array_push ($ namesarrays," longjie ");
while (List ($ key, $ value) = each ($ namesarrays)
{< br> echo $ key. ":". $ value. "
";
}< br>
echo " 4. add elements at the beginning of the array
";
// 4. add an element at the beginning of the array
array_unshift ($ namesarrays, "aaaaaaaaaaaaaaa");
while (List ($ K, $ v) = each ($ namesarrays ))
{< br> echo $ K. ":". $ v. "
";
}

echo " 5. merge two arrays
";
$ array1 = array (" red "," blue "," yellow ");
$ array2 = array ("10001", "10002", "10003");
$ mergearray = array_merge ($ array1, $ array2 );
while (List ($ key, $ Val) = each ($ mergearray)
{< br> echo $ key. ":". $ Val. "
";
}< br>
echo " 6. delete the last element in the array
";
$ arraypops = array (" 1001 "," 1002 "," 1003 "," 1004 ", "1005");
$ arraypoped = array_pop ($ arraypops);
while (List ($ key, $ Val) = each ($ arraypops ))
{< br> echo $ key. ":". $ Val. "
";
}< br> echo "deleted element: $ arraypoped
";

echo " 6. delete the first element in the array
";
$ arrayshifts = array (" Zhang San "," Li Si "," Wang Wu ");
echo " *****************/
";
while (List ($ key, $ Val) = each ($ arrayshifts)
{< br> echo $ key. ":". $ Val. "
";
}< br> $ arrayshifted = array_shift ($ arrayshifts);
echo " *****************/
";
while (List ($ key, $ Val) = each ($ arrayshifts)
{< br> echo "delete :". $ key. ":". $ Val. "
";
}< br> echo "deleted element $ arrayshifted
";
echo " 7. array sorting
";

$ Fruitarray = array ("apple", "orange", "banana", "Kiwi", "Pear ");
/* Sort the array */
Sort ($ fruitarray );
/* Display each element and its serial number */
While (List ($ key, $ value) = each ($ fruitarray ))
{
Echo "$ key: $ value <br> ";
}
/***** Sort *******/
$ A = array ("apple", "orange", "banana", "Kiwi", "Pear ");
// Sort
Sort ($ );
/* Sort the array */
Foreach ($ A as $ K)
{
// Echo $ A [$ K]. "=>". $ v. "<br/> ";
Echo $ K. "<br/> ";
}

?>

Run the copy operation directly.