lambda inside of lambda?

[Chad Yoshikawa]

I'm trying to use create_function to create a new function with a
function body which calls a lambda function, but with no luck.

I get an "unexpected $end" parser error. Is this possible, or do I
need to use some other approach?

Here is sample code which generates the error. The first part works,
the second part does not:
===============cut here======================================
<?php
function test($a,$b) {
if ($a==$b) return 0; return ($a<$b)?-1:1;
}

function outer($a,$b,$innerfunctionname) {
return $innerfunctionname($a,$b);
}

$innerfunction = create_function('$a,$b','if ($a==$b) return 0; return
($a<$b)?-1:1;');

########First Part#############
#This works - prints -1
$outerfunction1 = create_function('$a,$b', "return outer(\$a,\
$b,'test');");
$result1 = $outerfunction1(3,4);
printf("Result1 is %d\n",$result1);

#######Second Part############
#This doesn't work -- prints "PHP Parse error: syntax error,
unexpected $end in /tmp/test.php(22) : runtime-created function on
line 1"
$outerfunction2 = create_function('$a,$b', "return outer(\$a,\
$b,'$innerfunction');");
$result2 = $outerfunction2(3,4);
printf("Result2 is %d\n",$result2);
?>

===============cut here======================================

[gosha bine]

Chad Yoshikawa wrote:

I'm trying to use create_function to create a new function with a
function body which calls a lambda function, but with no luck.

I get an "unexpected $end" parser error. Is this possible, or do I
need to use some other approach?

Here is sample code which generates the error. The first part works,
the second part does not:
===============cut here======================================
<?php
function test($a,$b) {
if ($a==$b) return 0; return ($a<$b)?-1:1;
}

function outer($a,$b,$innerfunctionname) {
return $innerfunctionname($a,$b);
}

$innerfunction = create_function('$a,$b','if ($a==$b) return 0; return
($a<$b)?-1:1;');

########First Part#############
#This works - prints -1
$outerfunction1 = create_function('$a,$b', "return outer(\$a,\
$b,'test');");
$result1 = $outerfunction1(3,4);
printf("Result1 is %d\n",$result1);

#######Second Part############
#This doesn't work -- prints "PHP Parse error: syntax error,
unexpected $end in /tmp/test.php(22) : runtime-created function on
line 1"
$outerfunction2 = create_function('$a,$b', "return outer(\$a,\
$b,'$innerfunction');");
$result2 = $outerfunction2(3,4);
printf("Result2 is %d\n",$result2);
?>

===============cut here======================================

Looks like a php bug to me. Lambdas' names start with the nul symbol
(\x00) and create_function seems to handle that incorrectly.

A test case

$a = "foo \x00";
var_dump($a);
var_dump(eval("return '$a';"));
$f = create_function('', "return '$a';");

I would report this.
--
gosha bine

extended php parser ~ http://code.google.com/p/pihipi
blok ~ http://www.tagarga.com/blok

[C.]

On 17 Aug, 07:35, gosha bine <[e-mail]:

Chad Yoshikawa wrote:

I'm trying to use create_function to create a new function with a
function body which calls a lambda function, but with no luck.

I get an "unexpected $end" parser error. Is this possible, or do I
need to use some other approach?

Here is sample code which generates the error. The first part works,
the second part does not:
===============cut here======================================
<?php
function test($a,$b) {
if ($a==$b) return 0; return ($a<$b)?-1:1;
}

function outer($a,$b,$innerfunctionname) {
return $innerfunctionname($a,$b);
}

$innerfunction = create_function('$a,$b','if ($a==$b) return 0; return
($a<$b)?-1:1;');

########First Part#############
#This works - prints -1
$outerfunction1 = create_function('$a,$b', "return outer(\$a,\
$b,'test');");
$result1 = $outerfunction1(3,4);
printf("Result1 is %d\n",$result1);

#######Second Part############
#This doesn't work -- prints "PHP Parse error: syntax error,
unexpected $end in /tmp/test.php(22) : runtime-created function on
line 1"
$outerfunction2 = create_function('$a,$b', "return outer(\$a,\
$b,'$innerfunction');");
$result2 = $outerfunction2(3,4);
printf("Result2 is %d\n",$result2);
?>

===============cut here======================================

Looks like a php bug to me. Lambdas' names start with the nul symbol
(\x00) and create_function seems to handle that incorrectly.

A test case

$a = "foo \x00";
var_dump($a);
var_dump(eval("return '$a';"));
$f = create_function('', "return '$a';");

I would report this.

--
gosha bine

extended php parser ~http://code.google.com/p/pihipi
blok ~http://www.tagarga.com/blok

Certainly I would expect it to work too.

I used create_function() quite a lot within PfP Studio and never had
this problem.

C.