What is the difference between $message and $$message?

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How to make a class in php?

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if i give Limit for mysql query through php command line script like this for ex. $limit=500; $total_items = 1500; for($start=0;$start<$total_items;){ $command = "/usr/bin/php -q /home/sitename/public_html/admin/feedmanager/test.php feedid ".$_GET['feedid']." start ".$start." end ".$limit ; $start = $start+$limit; $command_result = system($command); } so it's execute command for 3 times so it give limit to sql query but if i have 27000 data so it takes long time? so my question is that is that any way from php command line script that i can use for collect all the data at once?

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What is the difference between md5(), crc32() and sha1() crypto on php?

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Actually am working in existing project which is developed in .net, am converting the .net into php code. am facing problem after uploading the .php in server. amgetting the error message like "The page cannot be found" but its working perfectly in local host

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How we load all classes that placed in different directory in one php file , means how to do auto load classes.

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i have saved the password in encrypted format in database. now i want how to retrive the password in decrypted format.

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What is the PHP predefined variable that tells the What types of images that PHP supports?

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Why session is required?

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What are the options to transfer session ids?

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how can i upload only pdf files in my website? files has not a pdf extension mantioned

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How to delete a file from the system?

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