Who can explain the meaning of this sentence in detail?

Who can explain the meaning of this sentence in detail? While ($ row = mysql_fetch_assoc ($ result )):

Explanation

Reply to discussion (solution)

When the execution returns a result that is not empty, the loop continues.
It is difficult to control the use of while.

1. while (condition) {dosomething ();} when condition = true, dosomething () is always executed; otherwise, the loop is jumped out.
2. $ row = mysql_fetch_assoc ($ result) value assignment. If no more rows exist, false is returned.

In summary, dosomething (); is always executed before the database has no data.

In addition, it seems that mysql_fetch_assoc () is not recommended for php now. you can try to replace mysqli or pdo.

1. while (condition) {dosomething ();} when condition = true, dosomething () is always executed; otherwise, the loop is jumped out.
2. $ row = mysql_fetch_assoc ($ result) value assignment. If no more rows exist, false is returned.

In summary, dosomething (); is always executed before the database has no data.

In addition, it seems that mysql_fetch_assoc () is not recommended for php now. you can try to replace mysqli or pdo.

What does mysql_fetch_assoc mean?

1. while (condition) {dosomething ();} when condition = true, dosomething () is always executed; otherwise, the loop is jumped out.
2. $ row = mysql_fetch_assoc ($ result) value assignment. If no more rows exist, false is returned.

In summary, dosomething (); is always executed before the database has no data.

In addition, it seems that mysql_fetch_assoc () is not recommended for php now. you can try to replace mysqli or pdo.

What does mysql_fetch_assoc mean?

Returns the result row as an array.

What does mysql_fetch_assoc mean?

The official manual is the best tutorial.
Http://php.net/manual/zh/function.mysql-fetch-assoc.php