Posted by James Taylor on 02/09/05 12:24

Hi,
I have a set of functions which are potentially dangerous in terms of
memory hogging, and need to protect from memory overflow - this is I
want to detect when the memory overflow occurs.

The manual says that eval() will return false on a fatal error, so I
thought I could do something like the following, where it would produce
a "O" for each itteration, and when it failed (memory overflow) it would
continue and echo the last line. What I get however is this attached to
the end.

Any advice would be gratefully recieved (and perhaps, the documentation
on eval updating if it can not catch all fatal errors)

#! /usr/bin/php
<?php
$y = 0;
$str = "";
$code = '$str .= $str . "."; return true;';
$x = TRUE;
while($x != FALSE){
$x = eval($code);
echo "O";
$y ++;
}
echo "\n $y it's \n\n ". $str;
?>

run:
$ ./intellirun2.php
OOOOOOOOOOOOOOOOOOOOOO
Fatal error: Allowed memory size of 8388608 bytes exhausted (tried to
allocate 4194305 bytes) in
/home/jt/work2/sms/web/stats/intellirun2.php(8) : eval()'d code on line 1

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