如何找到字符串位置与其它字符串位置之间的字符数
例如,弦可能是:棕狐狸
我怎么知道r和f之间有多少个字符?
提前感谢
如何找到字符串位置与其它字符串位置之间的字符数
例如,弦可能是:棕狐狸
我怎么知道r和f之间有多少个字符?
提前感谢
$r_pos = strpos($str, r );
$distance = strpos($str, f , $r_pos) - $r_pos - 1;
echo $distance;
$str = "brown fox";
strpos($str, f ) - strpos($str, r );
使用 strpos
(或 strippos
用于案件 insuitive 搜索, 获得“ r” 的位置和“ f” 的位置。 然后, 减去这两个位置 。
$phrase = "brown fox";
echo stripos( $phrase, "f" ) - stripos( $phrase, "r" );
如果您的句子在“ r” 之前含有“ f”, 您可以通过将“ r” 位置作为 < code> stripos code> 的第三个参数, 来为“ f” 提供抵消 :
$r = stripos( $phrase, "r" );
$f = stripos( $phrase, "f", $r );
echo $f - $r;
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