PHP Functions Essential Reference by Greant Z., Merrall G., Gerken T.
By Greant Z., Merrall G., Gerken T.
"PHP features crucial Reference is an in depth and functional functionality reference for the Hypertext Preprocessor programming language. This operating programmer's advisor covers the center functionality teams plus three hundred extra standard Hypertext Preprocessor capabilities, and information 800 extra capabilities at the book's website, php-er.com. Written by way of operating builders and Hypertext Preprocessor neighborhood leaders, this booklet is stuffed with operating code that utilizers the wealthy number of features on hand with personal home page. each functionality is supported by means of a number of examples that illustrate the functionality in motion. This advisor to Hypertext Preprocessor is a must have for any severe Hypertext Preprocessor programmer.
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A rra y_1 First array to intersect a rra y_2 Second array to intersect . Further arrays to intersect Returns an array containing elements that are present in all array arguments. Returns: Array on success; NUL L on failure Description: This function accepts at least two arrays as arguments, and returns an array containing all elements that appear in all given array arguments. The keys of the resultant array are those of the matching elements from the first array argument. 1 Example: Calculate the intersection of three arrays $ arr ay_1 = array('b rown b at', 'fruit bat ', 'wombat' , 'baseball ba t'); $ arr ay_2 = array('g oatsuc ker', 'wombat', 'mongoose' , 'mon ami'); $ arr ay_3 = array('w ombat' , 'goatsucker', 'mongoose' , 'baseball ba t'); $ int ersec tion = arr ay_int ersect($array_1 , $array_2, $array_3); p rin t_r($ intersecti on); / * E xpect ed output: * * A rray * ( * [ 2] => wombat * ) * * N ote t hat the ke y is ' 2', which is th e matching key from the f irst array.
All arrays contain an internal array pointer, which PHP uses to keep track of which element of the array is currently in use. There are several functions for maneuvering this pointer around the array, and for finding the key or value of the current element. Element values are accessed by following the name of the array variable with a subscript containing the key of the desired element. A subscript is simply a pair of square brackets enclosing the key. If the key is a string literal, it should be in quotes within the subscript so that PHP doesn't try to parse it as a keyword: / * B ad id ea!
Many function descriptions also provide cross-references to related functions. The book is thoroughly indexed to help you find the details you need in a hurry. As developers ourselves, we understand the urge to flip to the page you need, spend 10 minutes reading, and then fling the book back on the shelf. That is exactly how we designed this book to be used. I l@ve RuBoard I l@ve RuBoard This Book's Web Site We wanted a book that supported the PHP community. New Riders kindly agreed to release the entire contents of the book under an open publication license that allows for electronic redistribution.