10 days to learn the first day of PHP _php

Previously wrote 10 days to learn ASP, 10 days to learn ASP, and now think about writing a PHP bar, but also a comparison of all. PHP Debugging methods I do not say here, there are many articles are introduced, there are many different combinations. For the time being, I am using Apache Web server and my SQL as the Web servers and databases, under the environment of php-4.3.3. Of course, the simple construction and access to view the database PHPMYADMIN is not rare.

As for the form design, I do not want to say more here, in the ten days learning ASP has been introduced.

The following is a brief introduction to PHP syntax.

1. Embedding Method:

ASP-like <%,php can be <?php or <?, the end symbol is, of course, you can also specify.

2. Reference file:

There are two ways to refer to a file: Require and include.
Require use methods such as require (myrequirefile.php);. This function is usually placed at the front of the PHP program, and before the PHP program executes, it is read into the file specified by require to make it a part of the PHP program's Web page. Commonly used functions, you can also use this method to introduce it into the Web page.

Include usage methods such as include (myincludefile.php);. This function is usually placed in the processing part of the process control. The PHP Program page reads the include file before it is read in. This way, you can simplify the process when the program executes.

3. Annotation method:

<?php
Echo This is the first example of this. \ n; This example is a comment for C syntax
/* This example uses multiple lines of
Comment Method */
Echo This is the second example. \ n;

Echo This is the third example. \ n; # This example uses UNIX Shell syntax annotations
?>

4. Variable type:

$mystring = I am a string;
$NewLine = change line \ n;
$int 1 = 38;
$float 1 = 1.732;
$float 2 = 1.4E 2;
$MyArray 1 = array (child, ugly, Yin, Mao);

This leads to two problems, first the PHP variable begins with $, the second PHP statement ends, and the ASP programmer may not be able to adapt. These two omissions are also the most procedural errors.

5, Operation symbols:

Mathematical operations: symbolic meanings
Addition operation
-Subtraction operation
* Multiplication operation
/Division Operation
% take remainder
Accumulation
--Diminishing

String Operations:

The arithmetic symbol has only one, is the English period. It can concatenate strings together and become merged new strings. & In ASP-like
<?

$a = PHP 4;
$b = Strong function;
echo $a. $b;
?>
Here also leads to two questions, first PHP output statement is echo, the second similar to ASP in the <%= variable%>,php can also <?= variable? >.

Logical operation:

Symbolic meaning
< less than
> Greater than
<= less than or equal to
>= greater than or equal to
= = equals
! = does not equal
&& (and)
And and (and)
|| or (OR)
or or (or)
XOR (XOR)
! No (not)

Today, let's talk about Process control tomorrow.

