1<! DOCTYPE html Public"-//w3c//dtd XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" >234<meta http-equiv= "Content-type" content= "text/html; Charset=utf-8 "/>5<title> Untitled Document </title>67 8<body>9 Ten<form action= "0320test1.php" method= "POST" > One<input type= "text" name= "txt"/> A<input type= "Submit" Name= "BTN" value= "Submit"/> -</form> - the<?PHP - - //Array Definition - //definitions in different ways, the array can put any type of data + //index array definition: - //$attr = Array (1,2,3,4, "AA"); + //print_r ($attr); A //definition of associative array: at $attr=Array("One" =>10, "2" = "AA", "three" =>20); - //Print_r ($attr); - //echo $attr [2]; - - //Array traversal - //for loop traversal, for indexed arrays, cannot traverse associative arrays in /*For ($i =0; $i <count ($attr); $i + +) - { to echo $attr [$i]. " <br> "; + }*/ - the //foreach traversal, which iterates through indexed arrays and associative arrays * /*foreach ($attr as $value) $ {Panax Notoginseng echo $value. " <br> "; - }*/ the + /*foreach ($attr as $key = $value) A { the echo $key. " = ". $value." <br> "; + }*/ - $ $ //each () function, take an element inside the array, take the value down, and return the element as an array - /*Print_r (each ($attr)); - echo "<br>"; the Print_r (each ($attr)); - echo "<br>";Wuyi Print_r (each ($attr)); the echo "<br>--------------------------"; - //Reset the pointer, point to the first element Wu Reset ($attr); - Print_r (each ($attr)); About echo "<br>"; $ Print_r (each ($attr)); - echo "<br>"; - Print_r (each ($attr));*/ - A //list () function + /*list ($a, $b, $c, $e, $f) = $attr; the echo $a; - echo $b; $ echo $c; the echo $e; the echo $f;*/ the the //using the each () and list () functions to iterate through an array, an indexed array and an associative array can be - /*list ($key, $value) = each ($attr); in echo $key. " = ". $value; the list ($key, $value) = each ($attr); the echo $key. " = ". $value;*/ About /* the while (list ($key, $value) = each ($attr)) the { the echo $key. " = ". $value." <br> "; + }*/ - the //PointersBayi /*Echo current ($attr);//Take the content pointed to by the present pointer value the Echo Key ($attr);//Take the index pointed to by the current pointer key the echo "<br>"; - Next ($attr);//move the pointer down - Echo current ($attr);//Take the content pointed to by the present pointer value the Echo Key ($attr);//Take the index pointed to by the current pointer key the echo "<br>"; the prev ($attr);//move the pointer up the Echo current ($attr);//Take the content pointed to by the present pointer value - Echo Key ($attr);//Take the index pointed to by the current pointer key the echo "<br>"; the End ($attr);//point pointer to last element the Echo current ($attr);//Take the content pointed to by the present pointer value94 Echo Key ($attr);//Take the index pointed to by the current pointer key the echo "<br>"; the Reset ($attr);//Reset the pointer the Echo current ($attr);//Take the content pointed to by the present pointer value98 Echo Key ($attr);//Take the index pointed to by the current pointer key About echo "<br>";*/ - 101 /* Do102 {103 Echo Key ($attr);104 Echo current ($attr); the echo "<br>";106 }107 While (Next ($attr))*/108 109 the //pre-defined arrays111 //print_r ($_server); the //var_dump ($_env);113 the the?> the</body>117118 119
1. Traversing array knowledge
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