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这个数字如何输出不了

WBOY
WBOYOriginal
2016-06-13 10:00:151109browse

这个数字怎么输出不了?

PHP code
<!--Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->$str = '12345678901234567890123456789012345678901234567890';$num = $str + 1;echo $num;


输出的是科学计数法,我想得到12345678901234567890123456789012345678901234567891

------解决方案--------------------
PHP code
$str = '12345678901234567890123456789012345678901234567890'; echo bcadd($str,'1');<div class="clear">
                 
              
              
        
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