php

2021-01-06

Today, I learned : PHP tutorials

Bookmark : javaTpoint (magic-constants) / tutorialsPoint (intro)

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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.

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1. variable rules

• variable name starts with alphabet or underscore(_).

• variable name is case-sensitive.

• variable name starts with $ sign. constants doesn't.

• static variable is stored dynamically and used globally.

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2. special variable properties

1)double-dollar ($$)

PHP supports variable name as a variable.

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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

result : Key: Sonoo Value: 550000 Key: Vimal Value: 250000 Key: Ratan Value: 200000