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Writing efficient PHP
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 Tutorial: Writing efficient PHP 
Tweaking PHP code
 1. The finer points of efficient PHP coding
 2. Using pre-increment versus post-increment
 3. Quoting strings
 4. Understanding the difference between print and printf
 5. Understanding the difference between require and include
 6. Keeping source include files small
 7. Making effective use of built-in functions
 8. Reducing looping with built-in functions
 9. Use HTTP 1.0 with fsockopen
 10. Avoid the "Top 21 PHP Programming Mistakes"
 11. Section summary
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