PHP 7 in easy steps by Mike McGrath

By Mike McGrath

PHP 7 in effortless steps will train you to code server-side scripts. It starts off via explaining tips on how to set up a unfastened internet server and the personal home page interpreter to create an atmosphere during which you could produce your personal data-driven server-side web content. you are going to methods to write Hypertext Preprocessor server-side scripts and the way to make MySQL database queries. Examples illustrate the right way to shop and retrieve consultation information, easy methods to supply a Message Board, and the way to entry internet companies APIs over Hypertext move Protocol.

PHP 7 in effortless steps has an easy-to-follow type that would entice a person who desires to commence generating data-driven web content, in addition to to internet builders desirous to upload server-side interplay to their web content, and the programmer who speedy desires to upload Hypertext Preprocessor to his or her talents set. it is going to additionally attract the hobbyists who are looking to start growing scripts for add to their very own ISP, the scholar, and to these looking a profession in computing who desire a basic knowing of server-side programming with PHP.

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The output here is now Hello Mike as desired. Array constants, in which all elements contain fixed data values, can also be created using the define() function like this: define( ‘WEEKDAYS’ , [ ‘Mon’, ‘Tue’ , ‘Wed’ , ‘Thu’ , ‘Fri’ ] ) ; The ability to create constant arrays with the define() function is new in PHP 7. Constants defined by the script author can be used just like the predefined constants that are built into PHP, such as PHP_VERSION and PHP_OS that describe the version and server operating system.

Both single and double quote marks can be used for this purpose, but you must use the same type of quote marks to denote the beginning and end of the text string. For example, both these statements make valid string assignments: $song_title = “Summertime Blues” ; $song_title = ‘Summertime Blues’ ; Where you wish to store a string of text that itself includes quote marks, you can “escape” the included quote marks by preceding them with a \ backslash character, or use the alternative type of quote mark within the string.

Php then open the page via HTTP to see the results and variable values get displayed PHP has some useful functions to work with numbers. For example, round($a) rounds $a to the nearest integer and number_format($a) adds commas to $a denoting groups of thousands. PHP 7 introduces a new intdiv() function that performs an integer division on two operands and returns an integer. For example, intdiv(10,3) returns 3 . = Inequality <> > Greater than < Less than >= Greater than or equal to <= Less than or equal to <=> Spaceship The <=> spaceship operator is a new feature in PHP 7.

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