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\n special character 
negated character classes 
negation operator, using in test expressions 
nextID( )  2nd 
NNTP servers and PHP programs 
nongreedy quantifiers 
notices from PHP interpreter 
number_format( ) 
numbers 
    comparing 
    comparing strings and 
    validating in forms 
numeric arrays, creating 
numrows( )  2nd 
NuSphere PHPEd text editor 

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