D e fi n i t i v e G u i d e t o Y i i 2 . 0 h t t p : / / w w w . y i i f r a m e w o r k . c o m / d o c / g u i d e Q i a n g X u e, A l ex a n d er M a k a r o v , C a r s t en B r a n d t , K P a u l , a n d m a n y co n t r i b u t o r s f r o m t h e Y i i co m m u n i t y T h i s t u t o r i a l i s r e l e a s e d u n d e r t h e T e r m s o f Y i i D o c u m e n t a t i o n . C o p y r v e d . C o n t e n t s 1 I n t r o d u c t i o n 1 1 . 1 W h a t i s Y i i . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1 . 2 U p g r a d i n g f r o m V e r s i o n 1 . 1 . . . .

m e n t at i on f or t h e I d r i s L an gu age Ve r s io n 1 .3 .1 C o n t e n t s 1 Th e I d r i s Tu t or i al 2 2 F r e q u e n t l y A s k e d Q u e s t i on s 67 3 I m p l e m e n t i n g S at e - aw ar e S y s t e m s i n I d r i s : Th e S T Tu t or i al 73 4 Th e E ff e c t s Tu t or i al 108 5 Th e or e m P r ov i n g 142 6 L an gu age R e f e r e n c e 153 7 Tu t or i al s on t h e d oc u m e n t at i on f or I d r i s h as b e e n p u b l i s h e d u n d e r t h e C r e at i v e C om m on s C C 0 Li c e n s e . As s u c h t o t h e e x t e n t p os s i b l e u n d e r l aw , T

m e n t at i on f or t h e I d r i s L an gu age Ve r s io n 1 .2 .0 C o n t e n t s 1 Th e I d r i s Tu t or i al 2 2 F r e q u e n t l y A s k e d Q u e s t i on s 67 3 I m p l e m e n t i n g S at e - aw ar e S y s t e m s i n I d r i s : Th e S T Tu t or i al 72 4 Th e E ff e c t s Tu t or i al 107 5 Th e or e m P r ov i n g 141 6 L an gu age R e f e r e n c e 152 7 Tu t or i al s on t h e d oc u m e n t at i on f or I d r i s h as b e e n p u b l i s h e d u n d e r t h e C r e at i v e C om m on s C C 0 Li c e n s e . As s u c h t o t h e e x t e n t p os s i b l e u n d e r l aw , T

D oc u m e n t at i on f or t h e I d r i s L an gu age Ve r s io n 0 .9 9 C on t e n t s 1 Th e I d r i s Tu t or i al 2 2 F r e q u e n t l y A s k e d Q u e s t i on s 61 3 Th e E ff e c t s Tu P r ov i n g 98 5 L an gu age R e f e r e n c e 109 6 Tu t or i al s on t h e I d r i s L an gu age 173 Not e : T h e d oc u m e n t at i on f or I d r i s h as b e e n p u b l i s h e d u n d e r t 0 Li c e n s e . As s u c h t o t h e e x t e n t p os s i b l e u n d e r l aw , T h e I d r i s C o m m u n i t y h as w ai v e d al l c op y r i gh t an d r e l at e d or n e i gh b or i n g r i gh

m e n t at i on f or t h e I d r i s L an gu age Ve r s io n 1 .2 .0 C o n t e n t s 1 Th e I d r i s Tu t or i al 2 2 F r e q u e n t l y A s k e d Q u e s t i on s 66 3 I m p l e m e n t i n g S at e - aw ar e S y s t e m s i n I d r i s : Th e S T Tu t or i al 71 4 Th e E ff e c t s Tu t or i al 106 5 Th e or e m P r ov i n g 140 6 L an gu age R e f e r e n c e 151 7 Tu t or i al s on t h e d oc u m e n t at i on f or I d r i s h as b e e n p u b l i s h e d u n d e r t h e C r e at i v e C om m on s C C 0 Li c e n s e . As s u c h t o t h e e x t e n t p os s i b l e u n d e r l aw , T

u m e n t at i on f or t h e I d r i s L an gu age Ve r s io n 1 .0 C o n t e n t s 1 Th e I d r i s Tu t or i al 2 2 F r e q u e n t l y A s k e d Q u e s t i on s 62 3 I m p l e m e n t i n g S t at e - aw ar e S y s t e m s i n I d r i s : Th e S T Tu t or i al 67 4 Th e E ff e c t s Tu t or i al 102 5 Th e or e m P r ov i n g 136 6 L an gu age R e f e r e n c e 147 7 Tu t or i al s on t h e d oc u m e n t at i on f or I d r i s h as b e e n p u b l i s h e d u n d e r t h e C r e at i v e C om m on s C C 0 Li c e n s e . As s u c h t o t h e e x t e n t p os s i b l e u n d e r l aw , T

u m e n t at i on f or t h e I d r i s L an gu age Ve r s io n 1 .0 C o n t e n t s 1 Th e I d r i s Tu t or i al 2 2 F r e q u e n t l y A s k e d Q u e s t i on s 62 3 I m p l e m e n t i n g S t at e - aw ar e S y s t e m s i n I d r i s : Th e S T Tu t or i al 67 4 Th e E ff e c t s Tu t or i al 102 5 Th e or e m P r ov i n g 136 6 L an gu age R e f e r e n c e 147 7 Tu t or i al s on t h e d oc u m e n t at i on f or I d r i s h as b e e n p u b l i s h e d u n d e r t h e C r e at i v e C om m on s C C 0 Li c e n s e . As s u c h t o t h e e x t e n t p os s i b l e u n d e r l aw , T

u m e n t at i on f or t h e I d r i s L an gu age Ve r s io n 1 .0 C o n t e n t s 1 Th e I d r i s Tu t or i al 2 2 F r e q u e n t l y A s k e d Q u e s t i on s 62 3 I m p l e m e n t i n g S t at e - aw ar e S y s t e m s i n I d r i s : Th e S T Tu t or i al 67 4 Th e E ff e c t s Tu t or i al 102 5 Th e or e m P r ov i n g 136 6 L an gu age R e f e r e n c e 147 7 Tu t or i al s on t h e d oc u m e n t at i on f or I d r i s h as b e e n p u b l i s h e d u n d e r t h e C r e at i v e C om m on s C C 0 Li c e n s e . As s u c h t o t h e e x t e n t p os s i b l e u n d e r l aw , T

u m e n t at i on f or t h e I d r i s L an gu age Ve r s io n 0 .9 9 .2 C o n t e n t s 1 Th e I d r i s Tu t or i al 2 2 F r e q u e n t l y A s k e d Q u e s t i on s 63 3 I m p l e m e n t i n at e - aw ar e S y s t e m s i n I d r i s : Th e S T Tu t or i al 68 4 Th e E ff e c t s Tu t or i al 103 5 Th e or e m P r ov i n g 137 6 L an gu age R e f e r e n c e 148 7 Tu t or i al s on t h e d oc u m e n t at i on f or I d r i s h as b e e n p u b l i s h e d u n d e r t h e C r e at i v e C om m on s C C 0 Li c e n s e . As s u c h t o t h e e x t e n t p os s i b l e u n d e r l aw , T

u m e n t at i on f or t h e I d r i s L an gu age Ve r s io n 1 .0 C o n t e n t s 1 Th e I d r i s Tu t or i al 2 2 F r e q u e n t l y A s k e d Q u e s t i on s 62 3 I m p l e m e n t i n g S t at e - aw ar e S y s t e m s i n I d r i s : Th e S T Tu t or i al 67 4 Th e E ff e c t s Tu t or i al 102 5 Th e or e m P r ov i n g 136 6 L an gu age R e f e r e n c e 147 7 Tu t or i al s on t h e d oc u m e n t at i on f or I d r i s h as b e e n p u b l i s h e d u n d e r t h e C r e at i v e C om m on s C C 0 Li c e n s e . As s u c h t o t h e e x t e n t p os s i b l e u n d e r l aw , T