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Note on PHP functions

巴扎黑
Release： 2016-11-29 11:01:23
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1.sprintf('%.1f',$str) is weird, is it rounding?

<?php  
  echo  sprintf(&#39;%.1f&#39;,7.52);  // 7.5  
  echo "\n";  
  echo  sprintf(&#39;%.1f&#39;,7.55); // 7.5  
  echo "\n";  
  echo  sprintf(&#39;%.1f&#39;,7.56); // 7.6
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PHP PHP 函数注意
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