php数组与字符串的转换函数

在php中我们要把字符串转换在数组可使用函数有str_split()、explode(),preg_split()函数了，如果把数组转换在字符串我们也有一个函数implode()函数与直接把数组连接起来。

我们先来看字符串转换成数组

str_split()

print_r(str_split("Hello")); 

Array ( [0] => H [1] => e [2] => l [3] => l [4] => o )

 

explode()

$str = "Hello world. It's a beautiful day."; print_r (explode(" ",$str)); 

//结果

Array ( [0] => Hello [1] => world. [2] => It's [3] => a [4] => beautiful [5] => day. )

 

preg_split()函数

$user_info = "+J+++G+++++w";
 $fields = preg_split("/+{1,}/", $user_info);
 while ($x < sizeof($fields)) :
    print $fields[$x]. "
 ";
    $x++;
 endwhile;

把数组转换在字符串

implode()

$array = array('a','b','c');

echo implode($array);

//结果  abc