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Validate Email Address in Two Ways

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This is a little code example that will validate an email address in two ways: - first the general syntax of the string is checked with a regular expression - then the domain substring (after the '@') is checked using the 'checkdnsrr' function function  validate_email ( $email ){     $exp  =  "^[a-z\'0-9]+([._-][a-z\'0-9]+)*@([a-z0-9]+([._-][a-z0-9]+))+$" ;    if( eregi ( $exp , $email )){       if( checkdnsrr ( array_pop ( explode ( "@" , $email )), "MX" )){         return  true ;       }else{         return  false ;       }    }else{       return  false ;    }    } ?>
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PHP: Calculate the percentage of a number.

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16   //My number is 928. $myNumber = 928 ;   //I want to get 25% of 928. $percentToGet = 25 ;   //Convert our percentage value into a decimal. $percentInDecimal = $percentToGet / 100 ;   //Get the result. $percent = $percentInDecimal * $myNumber ;   //Print it out - Result is 232. echo $percent ;
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Xampp MySQL not starting

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  If changing port number doesn't solve your problem, follow steps and this solves problem: (** By these steps don't need to reinstall Xampp or loss your database**) Stop all Xampp services and exit application. Move to c:\xampp\mysql Rename data folder to data_old create new data folder and copy whole content of backup folder to the data folder except "ibdata1"  5) Select all files in data_old folder and paste into data folder ( Note  Don't replace copied files and skip replace theme).
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