php将字符串全部转换成大写或者小写的方法_php技巧

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Release: 2016-05-16 20:20:42
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本文实例讲述了php将字符串全部转换成大写或者小写的方法。分享给大家供大家参考。具体分析如下:

php中可以通过strtolower和strtoupper两个函数将字符串中的每个英文字符全部转换成小写或者大写

<&#63;php
$string = "Learn PHP string functions at jb51.net";
$lower = strtolower($string);
$upper = strtoupper($string);
print("$lower\n");
print("$upper\n");
print("\n");
&#63;>
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输出结果如下:

learn php string functions at jb51.net
LEARN PHP STRING FUNCTIONS AT JB51.NET
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希望本文所述对大家的php程序设计有所帮助。

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