reference:Placeholder variables

Placeholder variables

What are Placeholder variables?

Placeholder variables are variables that are used for a short time in a PHP document.

They should have a logic name.

Names

• $sql
  • Contains an sql code.
• $db_erg
  • The return value of an mysql_query() function.
• $row[]
  • Database rows.
• $code
  • HTML code that get outputed.

I need more than one placeholder variable.

Just add a number at the end. Like $code3.