A PHP Error was encountered

Severity: Notice

Message: Trying to get property of non-object

Filename: views/tutorial.php

Line Number: 233

A PHP Error was encountered

Severity: Notice

Message: Trying to get property of non-object

Filename: views/tutorial.php

Line Number: 235

Some usefull regular expression

^phplanguage$ “phplanguage” when it is alone on a string
[abc]                 a, b, or c
[a-z]                 Any lowercase letter
[^A-Z]                Any character that is not a uppercase letter
(gif|jpg)                Matches either “gif” or “jpeg”
[a-z]+                One or more lowercase letters
[0-9.-]                 Ð┬Ény number, dot, or minus sign
^[a-zA-Z0-9_]{1,}$ Any word of at least one letter, number or _
([wx])([yz]) wy, wz, xy, or xz
[^A-Za-z0-9] Any symbol (not a number or a letter)
([A-Z]{3}|[0-9]{4}) Matches three letters or four numbers


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