php去除头尾空格的2种方法

$test = " dfadad 论责民与三英的关系775fd   ";
$test = preg_replace('/^( |/s)*|( |/s)*$/', '', $test);
var_dump($test);

//结果如下：

string 'dfadad 论责民与三英的关系775fd' (length=35)

$test = " dfadad 3333adf775fd  ";
$test = trim(html_entity_decode($test),chr(0xc2).chr(0xa0));
var_dump($test);

//结果如下：

string 'dfadad 3333adf775fd' (length=19)