时不时用一下的php内置函数

字符串函数

字符串转数组explode()

   explode();
   $str = 'a,b,c';
   $cc = explode(',',$str);
   array ( 0 => 'a', 1 => 'b', 2 => 'c', )

数组转字符串implode()

   $str = [
            0 => 'a',
            1 => 'b',
            2 => 'c'
        ];
    $cc = implode(',',$str);
    'a,b,c'

子字符串替换str_replace()

 $str =  'a,b,c';
 $cc =   str_replace('a','A',$str);
 'A,b,c'

数组函数

合并数组array_merge（）

$str = [
            0 => 'a',
            1 => 'b',
            2 => 'c'
        ];
 $array['shop'] = 'f';
 $str =   array_merge($str,$array);
array ( 0 => 'a', 1 => 'b', 2 => 'c', 'shop' => 'f', )

水水的写几个