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How does “304 Not Modified” work exactly?
... If-Modified-Since or If-None-Match header, telling the server to send a 304 if the content still has that date or ETag.
The server needs some way of calculating a date-modified or ETag for each version of each resource; this typically comes from the filesystem or a separate database column.
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How do I get the function name inside a function in PHP?
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4 Answers
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Active
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Appending to an existing string
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answered Mar 1 '10 at 15:44
sepp2ksepp2k
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Creating java date object from year,month,day
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JB NizetJB Nizet
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How to check if field is null or empty in MySQL?
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194
Either use
SELECT IF(field1 IS NULL or field1 = '', 'empty', field1) as field1
from tablename
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How do I modify a MySQL column to allow NULL?
MySQL 5.0.45
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What is the purpose of the -nodes argument in openssl?
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The option -nodes is not the English word "nodes", but rather is "no DES". When given as an arg...