PhP：将数组分解成多行

Question

我从很多年以来一直在编程php。现在我有了一个新的愿望。我想和一个长字符串更可读的数组：

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

首先尝试：我已经试过这没有成功：

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

第二个尝试：我已经试过这没有成功：

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

顺便说一句：有没有机会建立字符串之前，我必须在这一行。如何将数组分成更多行？

我被要求展示真实的例子，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() { 

    } 
} 

变量是一个类的属性，我和 JKWerte :: purifyoptions调用它;

Answer 1

静态类变量不能用PHP中的表达式进行初始化。

这里是分裂通过HEREDOC语法字符串的一种方式，只要它可能含有额外的空间和换行：

<?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); 
?> 

输出：

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，您可以定义内容以后你的静态变量，例如类定义后：

<?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) 
?> 

输出：

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" 
}