Stack Exchange

John Downey

United States

http://jtdowney.com

Developer and Product Security Lead @ Braintree

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Top Questions
Top Answers
613
What is the single most influential book every programmer should read?
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437
How do you format an unsigned long long int using printf?
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145
How do you debug PHP scripts?
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131
How to return an XML string as an action result in MVC
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121
What is the point of interfaces in PHP?
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64
How do I index a database column
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27
Hashing a credit card number for use as a fingerprint
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23
Essential Programming Tools
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23
How to implement unit testing in PHP?
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23
What is Reflected XSS?
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20
php md5 algorithm that gives same result as c#
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18
Connect PHP to IBM i (AS/400)
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17
System.BadImageFormatException: How to fix .NET version mismatch?
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17
How to word-break on a dash?
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16
Adding a Method to an Existing Object Instance
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15
What is the best interview question?
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13
PHP + MYSQLI: Variable parameter/result binding with prepared statements
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12
Looking for algorithm that reverses the sprintf() function output
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11
LINQ on the .NET 2.0 Runtime
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11
Does sending credit card info over email violates PCI DSS?
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10
How to get an “A” on Qualys SSL Labs with Apache 2.2?
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10
SAML, and forcing a re-authentication
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10
What is the best way to handle multiple permission types?
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8
How can Stripe be PCI-compliant?
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8
Keyboard for programmers
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8
ASP, need to use SFTP
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7
Using a Public-Key-Encryption browser side to avoid PCI compliance
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7
What is the threat model for AWS EBS volumes encryption?
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6
With a very large number of GUIDs, can one predict the previous and subsequent GUIDs that will be generated?
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6
Do I need a new CSR for a certificate renewal?
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