Hello, lists,
We have discussed about implementing anonymous functions and
closures in PHP.
However, I consider that implementing anonymous functions and
implementing lexical scopes should be discussed separately.
# Even though I like closure. ;-)
So I wrote anonymous function patch for PHP 5.3 and 6.0.
Patches (inlcude tests):
for PHP 5.3: http://www.opendogs.org/pub/php-5.3dev-080109-
anon.patch
for PHP 6.0: http://www.opendogs.org/pub/php-6.0dev-080109-
anon.patch
Featues:
- Unlike create_function(), there is no need to take care of
quotes, backslashes and dollars .
- Can be used in loop, but be compiled only once.
- Supports recursive call using __FUNCTION__.
- Supports inline execution. It works like a block scope.
- Works with opcode caches.
Since I couldn't build APC against PHP 5.3, I have tested
PHP 5.2.5 + anonymous function patch and APC 3.0.16.
Example:
<?php
// callback
$arr = array(5, 3, 6, 0);
usort($arr, function($a, $b){ return $a - $b; });
print_r($arr); // 0, 3, 5, 6
// assign to a variable
$lambda = function(){
echo "Hello, World!\n";
};
$lambda(); // "Hello, World!"
// inline execution
$result = function($a, $b){
return $a + $b;
}(1, 2);
var_dump($result); // "int(3)"
?>
The anonymous function name is composed of '\0',
"ZEND_ANON<#serial>",
filename and character position.
- Leading '\0' blocks to be displayed by get_defined_functions().
- "ZEND_ANON<" helps determine wheter the function is anonymous
or not
because '<' cannot be used for user-defined function name.
- Serial number and file informations make the name unique.
- char anon_key_buf[32] is long enough because
`snprintf(anon_key_buf, 32, "ZEND_ANON<%llu>", (unsigned long
long)UINT64_MAX)'
returns 31.
Regards,
2008/1/6, Marcus Boerger <[EMAIL PROTECTED]>:
Hello Stanislav,
tha makesw three then already, how about we ask around again?
Ryusuke, can you please start a new '[RFC] Square brackets
shortcut' thread
to collect opinions and pass along the patch for that?
I like the anonymous function patch too. It is clean and simple.
Maybe you
want to start a second '[RFC] Anonymous functions' thread with
that patch.
Can you also please add tests for both?
marcus
Wednesday, January 2, 2008, 7:51:06 PM, you wrote:
the square bracket array syntax patch for PHP 5.3,
http://www.opendogs.org/pub/php-5.3dev-080101-sbar.patch
I remember we discussed that already and it was rejected then
(even
though myself and Andi liked it) - did the people that objected
then
change their minds?
Best regards,
Marcus
--
/**
* Ryusuke SEKIYAMA
* [EMAIL PROTECTED]
*/
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