刪除字串開頭與末端的空白符號或是其他設定的符號(character_mask)。
trim ( string $str [, string $character_mask ] ) : string
Example:
$test1 = " hi, this is cyublog ";
print_r(trim($test1));
$test2 = "~~hi, this is cyublog~~ ";
print_r(trim($test2, "~"));
Output:
// trim($test1):
hi, this is cyublog
// trim($test2):
hi, this is cyublog