In John's human readable code version of Karolis code to dynimicly allocate need memory there are a few bugs. If you didn't compile with the "--enable-memory-limit" option, this script will error with a level E_ERROR. Bellow is a fixed version rapped as a function. To view replacement functions for memory_get_usage() look at http://us2.php.net/manual/en/function.memory-get-usage.php
<?php
function setMemoryForImage( $filename ){
$imageInfo = getimagesize($filename);
$MB = 1048576; // number of bytes in 1M
$K64 = 65536; // number of bytes in 64K
$TWEAKFACTOR = 1.5; // Or whatever works for you
$memoryNeeded = round( ( $imageInfo[0] * $imageInfo[1]
* $imageInfo['bits']
* $imageInfo['channels'] / 8
+ $K64
) * $TWEAKFACTOR
);
//ini_get('memory_limit') only works if compiled with "--enable-memory-limit" also
//Default memory limit is 8MB so well stick with that.
//To find out what yours is, view your php.ini file.
$memoryLimit = 8 * $MB;
if (function_exists('memory_get_usage') &&
memory_get_usage() + $memoryNeeded > $memoryLimit)
{
$newLimit = $memoryLimitMB + ceil( ( memory_get_usage()
+ $memoryNeeded
- $memoryLimit
) / $MB
);
ini_set( 'memory_limit', $newLimit . 'M' );
return true;
}else
return false;
}
}
?>