Tài liệu PHP and MySQL by Example- P4 pptx

... Because PHP uses the ASCII collating sequence, an uppercase “A” is represented as decimal 65 and an uppercase “B” as decimal 66, and so on. On the other hand, a lowercase “a” is 97 and a lowercase ... delimiter and returns an array. The implode() function takes an array and joins the elements together to form a string. Because these functions require that you understand PHP arrays and regular ... a String PHP provides a number of functions to split strings. The split() and spliti() functions split up a string and return an array. The explode() function splits up a string by a specified...

... </html> (The PHP Script upload_file .php) < ?php 6 $handle=fopen($_FILES['user_file']['tmp_name'], "r"); 7 while(!feof($handle)){ 8 $text=fgets($handle); echo ... http://us2 .php. net/phpinfo. For a complete list and definitions see http://us3 .php. net/manual/en/reserved.variables .php. 10.3.16. How to Get Server Information We have been working with HTML forms and ... “Files and Directories,” we talk about files and how to open and close them, read from them and write to them, copy them, lock them, upload them, compress them, and more, all from within a PHP...

... available for PHP today easily found on the Web. See http://smarty .php. net to find about Smarty, a template engine designed for PHP. ) To include files in your PHP program, the PHP include() and require() ... a string to a file and returns the number of bytes written, but does not require a filehandle. Otherwise it is the same as fwrite() and fputs(). Format int fwrite ( filehandle, string, [ int ... argument and returns TRUE if the filename exists and is readable. If the PHP script is being executed by the server, the server’s permissions (usually limited) determine whether or not the PHP program...

... #$%!ob_end_flush()!&36+*',6!')!6,*!6%+%))1(.<!@3*!')!3)%8!$%(%!*,!&23)$!,3*!*$%!@3&&%()!168!%68!*$%!,3*43*!@3&&%('69!&,(!*$')!)%))',65 Output Buffering and php. ini If you want buffering set for all your PHP scripts, you can enable the php. ini directive output_buffering. If you do, every PHP script will behave as if ... a Web page as follows: http://server/homepage .php !The server program, in this example, homepage .php, is a PHP program. PHP starts a session and sends a unique session ID number, similar ... Link” on page 721), and because the default method of passing session IDs back and forth from browser to server is through cookies, PHP provides specific cookie functions to handle the cookie-based...

... House class and creating a house object and accessing it. ###The gettype() and get_class() Functions PHP# provides#a#number#of#builtKin#functions#that#return#information#about#classes #and# objects.#Table#17.1#gives#you#a#complete#list.#Two#functions#that#will#be#helpful#as#you#start#learning#about#objects#are#the#gettype() #and# the#get_class()#functions.#As#you#might#remember#(see#Chapter#4,#“The#Building#Blocks”)#from#when#we#discussed#data#types,#the#gettype()#function#takes#a#variable#as#its#argument #and# returns#its#data#type,#such#as#string,#boolean,#array, #and# so#on.#It#will#return#“object”#if#the#argument#represents#an#object#that#was#created#using#the#new#keyword.#The#get_class()#function#will#tell#you#the#name#of#the#class#from#which#the#object#was#created.##Table ... followed by an arrow and the property name. $Heidi is an object of class Employee and thus has variables name, address, and phone. 10 We declare another object of type Employee and this time ... resources, and so on. Typically, PHP releases the objects at the end of each script. Being able to use a destructor is a PHP 5 feature. PHP 4 does not have destructors at all. In PHP 4 you created...

... Why!was !PHP! developed,!what!it!is!used!for, !and! where!can!you!get!it?! 4. What!is !MySQL! used!for !and! where!can!you!get!it?! 5. What!are!the!benefits!of!using !PHP! and! MySQL? ! 6. Why!do !PHP! and! MySQL! work!well!together?! ... watermark.1.3.4. Advantages of MySQL and PHP Certain technologies play together better than others. PHP, a simple and powerful scripting language, and MySQL, a solid and reliable database server, ... uses PHP. We will learn how to create and execute simple PHP scripts both from the browser and at the command line. We will talk about built-in functions and how to use them by viewing the PHP...

... fgets($filehandle); // Reads a character from file attached to $filehandle $char = fgetc($filehandle); // Reads chunk of bytes from file attached to $filehandle $text = fread($filehandle, $bytes ... a script and within functions. They are special variables provided by PHP to help you manage HTML forms, cookies, sessions, and files, and to get information about your environment and server. ... assume register_globals is set to “On.” How PHP Handles Form Input For each HTML form parameter, PHP creates a global variable by the same name and makes it available to your script. For example,...

... $x and $y and $z; echo "$x and $y and $z <em>yields</em> " . (int)$result .".\n<br />"; 4 $result = ($x and $y and $z); echo "($x and $y and ... About PHP Operators and Expressions Data objects can be manipulated in a number of ways by the large number of operators provided by PHP. Operators are symbols, such as +, -, =, >, and <, ... **Figure 5.14. The PHP script output from Example 5.11. ** The Difference Between &&/|| and the Words and/ or You can use the words and and or to replace && and ||, respectively,...

... The!HTML!submit!input!type!is!given!a!name,!submit_fare,!that!will!be!used!in!the!following !PHP! script. 4 The!opening !PHP! tag!tells !PHP! to!start!processing. 5 Now!we!are!looking!at!the !PHP! instructions.!If!the!user!pressed!the!submit!button,!this!file!will!execute. !PHP! will!store!the!names!of!the!input!devices!in!variables,!$age !and! $submit_fare.!This!conditional!expression!tests!to!see!if!those!variables!were!set.!If!they!weren’t!set,!then!the!form!was!either!not!submitted!or!the!user!left!it!empty,!or!both. ... special significance and those characters are represented by HTML entities, special symbols starting with an ampersand and terminated with a semicolon; for example, the < and > symbols are ... In!the!switch!expression,!the!value!of!$color!is!matched!against!the!values!of!each!of!the!following!case!labels.! (PHP! names!the!variable,!$color, !by! the!same!name!assigned!to!the!radio!button !and! assigns!to!the!varia b le!the!value!that!was!selected !by! the! user!when!he!or!she!clicked!the!button.!If!the!user!clicked!red,!then!$color!will!evaluate!to!red.)!See!Figures!7.6 !and! 7.7....

... Modifying a Value by Reference with a foreach Loop As of PHP 5, you can easily modify an array’s elements by preceding the value after the as keyword with &. This will assign by reference instead ... this watermark.8.1.8. Extracting Keys and Values from Arrays PHP provides functions that allow you to extract elements from an array and assign the keys and values to variables. The array_keys() ... !Figure 8.19. Modifying values by reference. Output from Example 8.15. 8.1.5. Checking If an Array Exists PHP makes it possible to check to see if an array exists, and to check for the existence...