By Peter MacIntyre
Get prior the entire hype approximately Hypertext Preprocessor and dig into the genuine strength of this language. This ebook explores the main helpful positive aspects of personal home page and the way they could accelerate the internet improvement procedure, and explains why the main regular personal home page components are usually misused or misapplied. You'll research which elements upload power to object-oriented programming, and the way to take advantage of convinced positive aspects to combine your program with databases.
Written by way of an established member of the personal home page neighborhood, PHP: the great Parts is perfect for brand new personal home page programmers, in addition to net builders switching from different languages.
* get to grips with PHP's simple syntax, variables, and datatypes
* how you can combine the language with websites
* know how to exploit strings, arrays, and PHP's integrated features
* detect the benefits of utilizing Hypertext Preprocessor as an object-oriented language
* discover how Hypertext Preprocessor interacts with databases, comparable to SQLite and MySQL
* research enter- and output-handling top practices to avoid safety breaches
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Additional info for PHP: The Good Parts: Delivering the Best of PHP
Creating an array in this fashion may or may not be what you want. The other method available is to use the array function with the key/value pairs passed together and separated by commas, like so: $myArray = array(0 => 1, 1 => 2, 2 => 3, 3 => 4, 4 => 5) ; This way of creating an array is much more condensed, yet it may be a little more difficult for humans to read. If you want to create an empty array, just use the array function without any parameters: $a = array() The keys of any array have to be named uniquely, otherwise there would be confusion when referencing their contents.
Again, you can also build strings with a combination of both single and double quotes; just be aware of the interpolative characteristics of the double quotes that the single quotes do not have. Also be aware of the new line directive within a string and how it is interpreted by double quotes and single quotes. When the new line directive (\n) is encased within a single quote string, it will not work, yet within double quotes it will. The following code snippet demonstrates this: echo 'This sentence will not produce a new line \n'; echo "But this one will \n"; There is room for flexibility in the combinations of quotes that you can use, so be brave and experiment with them to see what you can accomplish.
_GET The next superglobal entity to discuss is $_GET. The $_GET value is created automatically with the existence of a query string within a URL, or if a form is submitted with the 22 | Chapter 2: Casing the Joint GET method (which still uses the URL as its vehicle). Any information that is sent along the query string in a key/value pair is subsequently loaded into the $_GET array in the called page. login=1&logname=“Fred” This URL example has two keys in the query string, one called login and the other called logname.