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PHP
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Hello, World
1YOU ARE HERE
Lesson 1+50 XP
Hello, World
echo.
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2
Lesson 2+50 XP
Variable
$ prefix.
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3
Lesson 3+80 XP
Concat
Dot operator.
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4
Lesson 4+70 XP
If
Curly braces.
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5
Lesson 5+70 XP
Array
Numeric.
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6
Lesson 6+90 XP
Associative Array
Like dict.
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7
Lesson 7+100 XP
Foreach
Iterate.
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8
Lesson 8+90 XP
Function
function keyword.
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9
Lesson 9+110 XP
Class
OOP.
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10
Lesson 10+90 XP
If / Else
Two branches.
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11
Lesson 11+90 XP
While
Loop.
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12
Lesson 12+100 XP
For Loop
Counter loop.
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13
Lesson 13+70 XP
strlen
String length.
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14
Lesson 14+90 XP
Isset
Check exists.
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15
Lesson 15+90 XP
New Object
Instantiate.
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16
Lesson 16+70 XP
Variable Interp
In double quotes.
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17
Lesson 17+110 XP
Arrow Function
fn shorthand.
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18
Lesson 18+100 XP
Null Coalescing
?? operator.
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19
Lesson 19+130 XP
Constructor
__construct method.
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20
Lesson 20+110 XP
Static Method
self::.
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