10 days to learn the first day of Php _php Foundation

Previously written 10 days to learn the ASP, 10 days to learn asp.net what, now think about writing a PHP bar, also calculate more complete. PHP Debugging methods I do not say here, outside a lot of articles are introduced, there are many different combinations. I'm here for the moment with the Apache Web server and my SQL as Web servers and databases, under the php-4.3.3 environment. Of course, simple build and access to view the database phpMyAdmin must be minimal.

As for the form design, I do not want to say more, in the "Ten Days of the Institute of ASP" has been introduced.

The following is a brief introduction to the syntax of PHP.

1. Embedding Method:

Similar to the ASP <%,php can be <?php or yes, the end symbol is, of course, you can also specify.

2. Reference documents:

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 top of the PHP program, PHP program before executing, will first read into the require designated to introduce the file, so that it becomes part of the PHP Program Web page. A commonly used function can be introduced into a Web page in this way.

Include use methods such as include ("myincludefile.php");. This function is typically placed in the processing section of the Process Control. The PHP Program page reads the included file when it is read. This way, you can simplify the process of executing a program.

3, annotation method:

<?php
echo "This is the first example. \ n "; This example is a comment for C + + syntax
/* This example uses multiple lines of
Comment Mode * *
echo "This is the second example. \ n ";

echo "This is the third example. \ n "; # This example uses the UNIX Shell syntax annotation
?>

4. Variable type:

$mystring = "I am a string";
$NewLine = "line changed \ n";
$int 1 = 38;
$float 1 = 1.732;
$float 2 = 1.4E+2;
$MyArray 1 = Array ("Zi", "ugly", "Yin", "Mao");

This leads to two questions: first PHP variables begin with $, and the second PHP statement ends with a possible ASP programmer that doesn't fit. These two omissions are also the most error in the procedure.

5. Operation Symbol:

Mathematical operations: Symbolic meaning
+ addition operation
-Subtraction operation
* Multiplication operation
/Division Operations
% take remainder
+ + Additive
--Diminishing

String Operations:

There is only one operation symbol, the period of English. It can concatenate strings into a new merged string. Similar to & in ASP
?

$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 the <%= variable%>,php in ASP can also <?= variables? >.

Logical operations:

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

Let's talk about it today. Process Control tomorrow.