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将字符从字符串位置 x 到字符串位置 y 计数
原标题:Count characters from string position x to string position y
  • 时间:2012-05-21 23:46:22
  •  标签:
  • php

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

最佳回答
$r_pos = strpos($str,  r );
$distance = strpos($str,  f , $r_pos) - $r_pos - 1;
echo $distance;
问题回答
$str = "brown fox";
strpos($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 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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