使用PHP在MySQL中选择一行的最佳方法是什么？

Question

I have a mysql statement which grabs just one record based on an id. I want to know if using mysql_fetch_row or something along the lines of that is better then using something such as mysql_fetch_array, for just grabbing one row in a database.

It may seem like common sense to go with the mysql_fetch_row but I just want to make sure.

Answer 1

An important thing to note is that using mysql_fetch_array() is not significantly slower than using mysql_fetch_row() , while it provides a significant added value.

Source

Answer 2

你为什么不只在mysql语句中使用LIMIT 1 ，而无论你将拥有一行。

Answer 3

The two functions are almost identical, the name is just making you think it's different:

$r=mysql_query('SELECT name,email FROM tbl LIMIT 1');
var_dump(mysql_fetch_assoc($r));
    // array('name'=>[dbName], 'email'=>[dbEmail]);
var_dump(mysql_fetch_row($r));
    // array([dbName], [dbEmail]);
    // It's a normal incremental integer index array
var_dump(mysql_fetch_array($r,MYSQL_ASSOC));
    // same as mysql_fetch_assoc();
var_dump(mysql_fetch_array($r,MYSQL_NUM));
    // same as mysql_fetch_row();
var_dump(mysql_fetch_array($r,MYSQL_BOTH));
    // array(0=>[dbName], 1=>[dbEmail], 'name'=>[dbName], 'email'=>[dbEmail]);

The manual also suggests performance wise the two functions fared well. Local tests hint in the same direction. I'd suggest you not worry about the .0001 time/memory saved and find true bottlenecks in your applications.