#37016 [NEW]: lambda functions unusable in create_function()

From: a at b dot c dot de Operating system: Windows XP PHP version: 5.1.2 PHP Bug Type: Scripting Engine problem Bug description: lambda functions unusable in create_function() Description: ------------ When inserting (the name of) a lambda function provided by create_function into a string that will be used to create a second lambda function, the second function fails to parse. The parse error message makes what appears to be a spurious complaint about the code; only Test 5's error message makes sense (plus, it seems there is no "callable" version of a lambda function's name). (Cf. bug #10721 - parser chokes on lambda function names in eval'd code) Reproduce code: --------------- I made five distinct tests to bracket the issue: TEST 1: // Creating a function that calls an ordinary function (explict name) function always_true(){return true;} $afun = create_function('', 'return !always_true();'); echo "Calling $afun() " . ($afun() ? "returns true\n" : "returns false\n"); TEST 2: // Creating a function that calls an ordinary function (variable name) function always_true(){return true;} $b1 = 'always_true'; $bfun = create_function('','return !'.$b1.'();'); echo "Calling $bfun() " . ($bfun() ? "returns true\n" : "returns false\n"); TEST 3: // Creating a function that calls an anonymous function (explicit name); $c1 = create_function('','return true;'); $cfun = create_function('','return !'.chr(0).'lambda_3();'); echo "Calling $cfun() " . ($cfun() ? "returns true\n" : "returns false\n"); TEST 4: // Creating a function that calls an anonymous function (variable name) $d1 = create_function('','return true;'); $dfun = create_function('','return !'.$d1.'();'); echo "Calling $dfun() " . ($dfun() ? "returns true\n" : "returns false\n"); TEST 5: // Using is_callable to get a callable version of anonymous function name $e1 = create_function('', 'return true;'); if(!is_callable($e1,false,$callable_e1)) die("Couldn't call anonymous function."); echo "Using $callable_e1 as name of anonymous function\n"; $efun = create_function('','return !'.$callable_e1.'();'); echo "Calling $efun() " . ($efun() ? "returns true\n" : "returns false\n"); Expected result: ---------------- TEST 1: Calling lambda_1() returns false TEST 2: Calling lambda_1() returns false TEST 3: Calling lambda_2() returns false TEST 4: Calling lambda_2() returns false TEST 5: Using lambda_1 as name of anonymous function [?] Calling lambda_2() returns false Actual result: -------------- Actual Results: TEST 1: Calling lambda_1() returns false TEST 2: Calling lambda_1() returns false TEST 3: Parse error: parse error, unexpected '}' in test.php : runtime-created function on line 1 Fatal error: Function name must be a string in test.php on line 4 TEST 4: Parse error: parse error, unexpected '}' in test.php : runtime-created function on line 1 Fatal error: Function name must be a string in test.php on line 4 TEST 5: Using as name of anonymous function Parse error: parse error, unexpected ')' in test.php : runtime-created function on line 1 Fatal error: Function name must be a string in test.php on line 6 -- Edit bug report at http://bugs.php.net/?id=37016&edit=1 -- Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=37016&r=trysnapshot44 Try a CVS snapshot (PHP 5.1): http://bugs.php.net/fix.php?id=37016&r=trysnapshot51 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=37016&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=37016&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=37016&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=37016&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=37016&r=needscript Try newer version: http://bugs.php.net/fix.php?id=37016&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=37016&r=support Expected behavior: http://bugs.php.net/fix.php?id=37016&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=37016&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=37016&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=37016&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=37016&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=37016&r=dst IIS Stability: http://bugs.php.net/fix.php?id=37016&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=37016&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=37016&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=37016&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=37016&r=mysqlcfg