Accidental attention to database security related issues, as follows

Accidental attention to database security issues, as follows
One table ID field primary KEY self-increment

If you want to delete a piece of data

So

"Delete from Test where id=". $_post[' ID ']

The question is, is it possible that this is not safe?

"Delete from Test where id=". $_post[' ID ']

$_post[' id '] = 2 or 1=1 situation

Will this happen, causing all of the deletions to occur?

------Solution--------------------
Yes, so it's generally quoted for numeric types.
"Delete from test where id= ' $_post[id] '"
------Solution--------------------
It's possible. This is often said to be anti-SQL injection. Escapes special characters.
------Solution--------------------
It's impossible to have an escape if it's quoted.
------Solution--------------------
Intval
------Solution--------------------
Method One: Set in php.ini: MAGIC_QUOTES_GPC = Off

Method Two: $str =stripcslashes ($STR)

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