strcasecmp

(PHP 3 >= 3.0.2, PHP 4, PHP 5)

strcasecmp -- 大文字小文字を区別しないバイナリにも使用可能な文字列比較を行う

説明

int strcasecmp ( string str1, string str2 )

str1 が str2 より小さい場合は負、str1 が str2 より大きい場合は正、等しい場合は 0 を返します。
例 1. strcasecmp()の例

<?php $var1 = "Hello"; $var2 = "hello"; if (strcasecmp($var1, $var2) == 0) { echo '$var1 is equal to $var2 in a case-insensitive string comparison'; } ?>

preg_match()、 strcmp()、 substr()、 stristr()、 strncasecmp() および strstr() も参照ください。

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strcasecmp

27-Aug-2002 10:53


The sample above is only true on some platforms that only use a simple 'C' locale, where individual bytes are considered as complete characters that are converted to lowercase before being differentiated.



Other locales (see LC_COLLATE and LC_ALL) use the difference of collation order of characters, where characters may be groups of bytes taken from the input strings, or simply return -1, 0, or 1 as the collation order is not simply defined by comparing individual characters but by more complex rules.



Don't base your code on a specific non null value returned by strcmp() or strcasecmp(): it is not portable. Just consider the sign of the result and be sure to use the correct locale!

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strchr

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str_word_count

Last updated: Wed, 01 Nov 2006