PhP：將數組分解成多行

Question

我從很多年以來一直在編程php。現在我有了一個新的願望。我想和一個長字符串更可讀的數組：

$var = array('help' => 'This is a very long help text. This is a very long help text. This is a very long help text.'); 

首先嚐試：我已經試過這沒有成功：

$var = array('help' => 'This is a very long help text.' 
. 'This is a very long help text.' 
. 'This is a very long help text.'); 

第二個嘗試：我已經試過這沒有成功：

$var = array('help' => 'This is a very long help text.' . 'This is a very long help text. This is a very long help text.'); 

順便說一句：有沒有機會建立字符串之前，我必須在這一行。如何將數組分成更多行？

我被要求展示真實的例子，那就是：

class JKWerte { 
    public static $purifyoptions = array(
    'HTML.Allowed' => 'table, thead, tbody, tfoot, th, tr, td, img[src|alt], div, span, p, br, ul, ol, li, *[class], *[style], *[height], *[width], h1, h2, h3, h4, a[href|title], b, i, em, strong'); 

    public function test() { 

    } 
} 

變量是一個類的屬性，我和 JKWerte :: purifyoptions調用它;

Answer 1

靜態類變量不能用PHP中的表達式進行初始化。

這裏是分裂通過HEREDOC語法字符串的一種方式，只要它可能含有額外的空間和換行：

<?php 
class JKWerte { 
    public static $purifyoptions = array(
    'HTML.Allowed' => <<<EOT 
    table, thead, tbody, 
    tfoot, th, tr, td, 
    img[src|alt], div, 
    span, p, br, ul, ol, 
    li, *[class], *[style], 
    *[height], *[width], h1, 
    h2, h3, h4, a[href|title], 
    b, i, em, strong 
EOT 
    ); 

    public function test() { } 
} 

var_dump(JKWerte::$purifyoptions); 
?> 

輸出：

array(1) { 
    ["HTML.Allowed"]=> 
    string(213) "  table, thead, tbody, 
    tfoot, th, tr, td, 
    img[src|alt], div, 
    span, p, br, ul, ol, 
    li, *[class], *[style], 
    *[height], *[width], h1, 
    h2, h3, h4, a[href|title], 
    b, i, em, strong" 
} 

另外，您可以定義內容以後你的靜態變量，例如類定義後：

<?php 
class JKWerte { 
    public static $purifyoptions = array(
    'HTML.Allowed' => '' 
    ); 

    public function test() { } 
} 

JKWerte::$purifyoptions['HTML.Allowed'] = 'table, thead, tbody, ' 
    .'tfoot, th, tr, td, ' 
    .'img[src|alt], div, ' 
    .'span, p, br, ul, ol, ' 
    .'li, *[class], *[style], ' 
    .'*[height], *[width], h1, ' 
    .'h2, h3, h4, a[href|title], ' 
    .'b, i, em, strong'; 

var_dump(JKWerte::$purifyoptions) 
?> 

輸出：

array(1) { 
    ["HTML.Allowed"]=> 
    string(172) "table, thead, tbody, tfoot, th, tr, td, img[src|alt], div, span, p, br, ul, ol, li, *[class], *[style], *[height], *[width], h1, h2, h3, h4, a[href|title], b, i, em, strong" 
}