Edit report at http://bugs.php.net/bug.php?id=50480&edit=1
ID: 50480 User updated by: lesjno at free dot fr Reported by: lesjno at free dot fr Summary: memory leak with eval() -Status: Feedback +Status: Open Type: Bug Package: Scripting Engine problem Operating System: * PHP Version: 5.3.1 New Comment: I've just tried the PHP 5.3.2 release but the memory leak remains. The test script is the following : CODE : ------ $status=""; $ch="\$result=true;"; // a chain with a good php syntax $memory_used1 = memory_get_usage(); $status = @eval($ch) ; $memory_used2 = memory_get_usage(); echo "chain to eval : \"$ch\" ==> status = "; var_dump($status); echo "<BR>"; echo "<b>memory difference = ".($memory_used2-$memory_used1)."<BR><BR></b>\n"; $ch="abcdef"; // a chain with a bad php syntaxe $memory_used1 = memory_get_usage(); $status = @eval($ch) ; $memory_used2 = memory_get_usage(); echo "chain to eval : \"$ch\" ==> status = "; var_dump($status); echo "<BR>"; echo "<b>memory difference = ".($memory_used2-$memory_used1)."<BR></b>\n"; Actual result: -------------- chain to eval : "$result=true;" ==> status = NULL memory difference = 512 chain to eval : "abcdef" ==> status = bool(false) memory difference = 8632 Expected result: -------------- chain to eval : "$result=true;" ==> status = NULL memory difference = 0 chain to eval : "abcdef" ==> status = bool(false) memory difference = 0 Previous Comments: ------------------------------------------------------------------------ [2010-04-25 20:39:15] fel...@php.net Please try using this snapshot: http://snaps.php.net/php5.3-latest.tar.gz For Windows: http://windows.php.net/snapshots/ ------------------------------------------------------------------------ [2009-12-24 01:00:01] php-bugs at lists dot php dot net No feedback was provided for this bug for over a week, so it is being suspended automatically. If you are able to provide the information that was originally requested, please do so and change the status of the bug back to "Open". ------------------------------------------------------------------------ [2009-12-22 08:59:14] lesjno at free dot fr Hello jani, I have a loop to update a database from an excel file. So, for each excel row I will apply several tests and initializations specified in a configuration file. The configuration file depend on the user profile. The eval() function is used, for example, for data initialization : the configuration file can give a data or a code. For example a specific date field can take a fix date ("2009-01-01") or can be computed. So, for example, I can found in a configuration file : for a user category : $field_init = '2009-01-01' ; for another user category : $field_init = 'return date("Y-m-d");' ; I will use the following code : $data = @eval($field_init) ; if ($data===false) $data=$field_init; It's only an example but there are a lot of others "eval()" like this for each excel row treatment. An excel file can have more than 50000 rows ... so the memory leak is growing up till the system error ... ------------------------------------------------------------------------ [2009-12-16 12:47:05] j...@php.net Please provide such script that actually has a loop. Simple test suggested this is just expected and memory does not really grow after certain point. ------------------------------------------------------------------------ [2009-12-15 13:27:53] lesjno at free dot fr Description: ------------ Memory used by the eval() function is not null and can be important (up to 8Ko) especially if the string is not evaluable. This memory used can't be released. Used in a big loop, the memory used is growing up and I get a memory error. Reproduce code: --------------- $result=""; $memory_used1 = memory_get_usage(); $ch="\$result=22;"; if (@eval($ch)===false) {$result = $ch ;} $memory_used2 = memory_get_usage(); echo "result=$result ==><b>memory difference = ".($memory_used2-$memory_used1)."<BR></b>\n"; $memory_used1 = memory_get_usage(); $ch="abcdef"; if (@eval($ch)===false) {$result = $ch ;} $memory_used2 = memory_get_usage(); echo "result=$result ==><b>memory difference = ".($memory_used2-$memory_used1)."<BR></b>\n"; Expected result: ---------------- result=22 ==>memory difference = 0 result=abcdef ==>memory difference = 0 Actual result: -------------- result=22 ==>memory difference = 200 result=abcdef ==>memory difference = 7480 ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/bug.php?id=50480&edit=1
