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php Programming Glossary: parityhttp://stackoverflow.com/questions/1418964/generating-luhn-checksums Luhn number iterations 1 while iterations 1 stack 0 parity strlen number 2 number str_split number 1 foreach number as.. str_split number 1 foreach number as key value if key 2 parity value 2 if value 9 value 9 stack value stack 10 stack 10.. number . abs stack return number I dropped the parity variable since we don't need it for this purpose and to verify..
What is the best way to validate a credit card in PHP? http://stackoverflow.com/questions/174730/what-is-the-best-way-to-validate-a-credit-card-in-php preg_replace ' D ' '' number Set the string length and parity number_length strlen number parity number_length 2 Loop through.. the string length and parity number_length strlen number parity number_length 2 Loop through each digit and do the maths total.. i digit number i Multiply alternate digits by two if i 2 parity digit 2 If the sum is two digits add them together in effect..
How to Read RS232 Serial Port in PHP like this QBasic Program http://stackoverflow.com/questions/3226979/how-to-read-rs232-serial-port-in-php-like-this-qbasic-program return buffer if setmode shell_exec 'mode com1 baud 2400 parity n data 8 stop 1 to on xon off odsr on octs on dtr on rts on..
Extended placeholders for SQL, e.g. WHERE id IN (??) http://stackoverflow.com/questions/3696327/extended-placeholders-for-sql-e-g-where-id-in Whereas the is a column column list joined by AND s. For parity I've added . The has other use cases out of UPDATE commands..
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