php
2021-01-06
Today, I learned : PHP tutorials
Bookmark : javaTpoint (magic-constants) / tutorialsPoint (intro)
0. PHP
1) echo statement
can have multiple input variables, separated by comma(,)s.
2) PHP properties
interpreted language (don't need compilers and such)
faster than other scripting languages
can be embedded into HTML.
object-oriented.
can create sessions.
can access / set cookies.
PHP is a secure language to develop the website. It consists of multiple layers of security to prevent threads and malicious attacks.
1. variable rules
variable name starts with alphabet or underscore(_).
variable name is case-sensitive.
2. special variable properties
1)double-dollar ($$)
2021.01.07
bookmark : javatpoint-phpForm
1.special Variables
special variable starts and ends with double underscore(__).
case insensitive.
resolved at compile-time.
2. Array Definintion
3. execution passage
wrap the shell code with ` (shft+"~").
result : root
4. call by reference
put ampersand(&) before the variable name.
result : Hello Call By Reference
5. parameter default value
result : Hello Rajesh Hello Sonoo Hello John
6. Associative Array & traversing
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