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在 PHP 中发现了一个奇怪的点，围观也好，吐槽也好，有没有科学解释？

  •   
  •   xiaoban · Mar 10, 2016 · 2731 views
    This topic created in 3896 days ago, the information mentioned may be changed or developed.

    $a='qqqq';
    echo 1 .$a;
    echo 1. $a;//报错

  • echo
  • 也好
  • qqqq'
  • PHP
    5 replies  •  2016-03-10 16:02:52 +08:00
    xiaoban
    xiaoban
    OP
    Mar 10, 2016
    1
    $a='qqqq';
    echo 1 空格.$a;
    echo 1.空格$a;
    发布出来有点不明显
    drush
    drush
    Mar 10, 2016❤️1
    2
    http://php.net/manual/en/language.operators.string.php#88827

    下面那個應該當成數字的小數點了
    chaclee
    chaclee
    Mar 10, 2016
    3
    @drush
    对的.
    echo (1). $a
    这样就不报错了.
    mhycy
    mhycy
    Mar 10, 2016
    4
    @xiaoban
    第二个 1. 解析成浮点数 1.0
    mhycy
    mhycy
    Mar 10, 2016
    5
    echo 1.. $a 也不报错
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