null
NULL
true
false
TRUE
FALSE
0
1
0.00
0.1
1.10
2.202
dirname( __FILE__ ) . '/some/path/'
( 0644 & ~ umask() )
'escaped single quote \' wrapped in single quotes'
'double quote " wrapped in single quotes'
"escaped double quote \" wrapped in double quotes"
"single quote ' wrapped in double quotes"