php数组插入数据库这个功能该怎么实现

原文网址:https://segmentfault.com/q/1010000004048449

比如一个数组
$a=array("a"=>"1","b"=>"2","c"=>"3");
现在想执行数据库插入语句insert into admin(a,b,c) values(1,2,3);该怎么实现？

1.

$keys; $value; $keys = implode(",", array_keys($a)); $value = implode(",",array_values($a)); $db->query("insert into admin(".$keys.") values(".$value.")")

2.

$a=array("a"=>"1","b"=>"2","c"=>"3"); $values=implode(',',array_values($a)); $keys="'".implode("','",array_keys($a))."'"; $sql='insert into admin'; $sql.='('.$keys.') '; $sql.='values '; $sql.='('.$values.') ';

3.

 写个方法:

function insert（$table,$data){ foreach($data as $k => $v){ $fields[] = $v; $keys[] = $k; } $values = "('".implode("','", $fields)."')"; $column = "(`".implode("`,`", $keys)."`)"; $sql = "insert into {$table} {$column} values {$values}"; $this->query($sql); }