douwen1937 2012-04-10 15:48
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php在数组赋值中将字符串连接到classconstant

following doesn't work:

<?php
class test{
    const t = 10;
    public static $y = array('t' => self::t . 'hello');
}
var_dump(test::$y);
?>

can somebody tell me why that is? :)

it fails in the ... => self::t . 'hello')... part, where it, as seams, not is able to concatenate a classconstant in the array().

that implies that both of following works perfect:

public static $y = array('t' => self::t);

and

public static $y = array('t' => 'hello');
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  • duangaixing1509 2012-04-10 15:54
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    can somebody tell me why that is?

    Concatenation is a product of run-time. Class member initial values must be known at parse time.

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