print_r为何多输出一个1?
奇怪,第一次看到这样子。
- PHP code
<!--Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->class test { public $test = array(); function test() { $this -> test[] = 'ok'; } function _echo() { foreach ($this -> test as $val) echo print_r($val); } } $test = new test(); $test -> _echo();
打印出 ok1
------解决方案--------------------
bool print_r ( mixed expression [, bool return] )
是函数当然会有返回值
对于你的应用,应写作
echo print_r($val, 1);
------解决方案--------------------
print_r
(PHP 4, PHP 5)
print_r -- 打印关于变量的易于理解的信息。
描述
bool print_r ( mixed expression [, bool return] )
---------------------------------------------
既然print_r何必还要echo,如需要也得加上第二个参数
- PHP code
echo print_r($var,true);<br><font color="#e78608">------解决方案--------------------</font><br>1 是print_r()函数的返回值<div class="clear"> </div>

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