imagecreatefromjpeg Script Stops Running - Out of Memory?

I'm trying to write a script that will create thumbnails of all images that are in a specific directory.  However, when I run the script, it stops running before completion.  I believe that I've narrowed it down to the imagecreatefromjpeg function.  If I comment this out, everything prints as expected.  If I run it with this line, I make it through about 30 images before the script stops.  I am using imagedestroy() after each image creation, but this doesn't seem to help.  I realize that I'm not really doing anything with these thumbnails, but once I can get the script to execute all the way (hopefully), then I'll add some logic to save them.


I'm using a hosting company (1and1), so I am not able to make changes to my php.ini file.  Also, if I comment out all the echos, I eventually get a 500 error, but it's a generic one from my host which doesn't give me any specifics as to what's going on.  I've included my code and am open to comments and suggestions.

Thank you!!

<?php
	$strSourcePath = "[path to original images]";
	$strNewThumbPath = "[output path to thumbnails]";
 
	if (is_dir($strSourcePath)) {
	    if ($objDirHandle = opendir($strSourcePath)) {
	        while (($file = readdir($objDirHandle)) !== false) {
				if(filetype($strSourcePath . $file) == "file"){
					$strSourceFilePath = $strSourcePath . $file;
					echo "Processing $strSourceFilePath...<br>";
 
					$size = @getimagesize($strSourceFilePath);
 
					if($size){
						echo "&nbsp;&nbsp;&nbsp;";
						print_r($size);
						echo "<br>";
					} else {
						echo "&nbsp;&nbsp;&nbsp;<b>Error determining getimagesize info for $strSourceFilePath.</b><br>";
					}
 
					if($size[2] == 1){
						echo "&nbsp;&nbsp;&nbsp;$strSourceFilePath is a GIF<br>";
						$bolConvert = false;
					} elseif($size[2] == 2){
						echo "&nbsp;&nbsp;&nbsp;$strSourceFilePath is a JPG<br>";
						$bolConvert = true;
					} elseif($size[2] == 6){
						echo "&nbsp;&nbsp;&nbsp;$strSourceFilePath is a BMP<br>";
						$bolConvert = false;
					} else {
						echo "&nbsp;&nbsp;&nbsp;<b>$strSourceFilePath is an unsupported type</b><br>";
						$bolConvert = false;
					}
 
					if($bolConvert){
						header('Content-type: ' . $size['mime']);
						$objThumbnail = imagecreatetruecolor(100,100) ;
						$objImage = @imagecreatefromjpeg($strSourceFilePath) ;
 
						imagecopyresampled($objThumbnail, $objImage, 0, 0, 0, 0, 100, 100);
 
						imagedestroy($objThumbnail);
						imagedestroy($objImage);
						unset($size);
					} else {
						echo "&nbsp;&nbsp;&nbsp;<b>Did not convert $strSourceFilePath</b><br>";
					}
				echo "<hr>";
				}
	        }
	        closedir($objDirHandle);
	    }
	} else {
		die("<b>$strSourcePath is not a valid directory.</b>");
	}
?>

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