What is user defined function in php?

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i got this error msg in online... how to solve this problem... i couldnot find out as soon as possible send me answer or idea COULD NOT ABLE TO CONNECT DATABASE . Can't connect to local MySQL server through socket '/usr/local/mysql-5.0/data/mysql.sock' (2)

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Explain me what is the difference between explode() and split() functions?

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How to execute an sql query? How to fetch its result?

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What is prepare in php?

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What is session in php why it is use?

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How to change the principal password?

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Please explain is it possible to use com component in php?

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What is compact function 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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Is there any function to find repeated value in an array? What is w2 standard

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What is variable declaration?

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