Doc #62997 [NEW]: Section on variables: explain $1 is always literal

From: php at richardneill dot org Operating system: Linux PHP version: Irrelevant Package: Documentation problem Bug Type: Documentation Problem Bug description:Section on variables: explain $1 is always literal Description: ------------ In something like pg_query_params(), it is OK to use eg $sql = "select * from table where id=$1" In other words, because variable names cannot begin with numbers, constructs such as $1, $2 etc are literal, even within double-quotes. This is actually quite helpful - and it seems to be deliberate (at any rate, no errors appear in logfile). I think the documentation should make it clearer. Test script: --------------- echo 'You owe me $100'; echo "You owe me \$100"; echo "You owe me $100"; all produce the same output. The 3rd of these is (to me) rather surprising, though useful, and isn't documented, either in the variable-naming or the double-quoted string sections. It should also appear in the pg_query_params() docs. -- Edit bug report at https://bugs.php.net/bug.php?id=62997&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=62997&r=trysnapshot54 Try a snapshot (PHP 5.3): https://bugs.php.net/fix.php?id=62997&r=trysnapshot53 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=62997&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=62997&r=fixed Fixed in SVN and need be documented: https://bugs.php.net/fix.php?id=62997&r=needdocs Fixed in release: https://bugs.php.net/fix.php?id=62997&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=62997&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=62997&r=needscript Try newer version: https://bugs.php.net/fix.php?id=62997&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=62997&r=support Expected behavior: https://bugs.php.net/fix.php?id=62997&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=62997&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=62997&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=62997&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=62997&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=62997&r=dst IIS Stability: https://bugs.php.net/fix.php?id=62997&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=62997&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=62997&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=62997&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=62997&r=mysqlcfg