本文实例讲述了php分割合并两个字符串的函数。分享给大家供大家参考。具体实现方法如下：
这里实现把两个字符串进行分割合并，例如str1=aaaa，str2=bbbb，合并后生成abababab
/**
* Merges two strings in a way that a pattern like ABABAB will be
* the result.
*
* @param string $str1 String A
* @param string $str2 String B
* @return string Merged string
*/
function MergeBetween($str1, $str2){
// Split both strings
$str1 = str_split($str1, 1);
$str2 = str_split($str2, 1);
// Swap variables if string 1 is larger than string 2
if (count($str1) >= count($str2))
list($str1, $str2) = array($str2, $str1);
// Append the shorter string to the longer string
for($x=0; $x < count($str1); $x++)
$str2[$x] .= $str1[$x];
return implode('', $str2);
}
//范例演示：
print MergeBetween('abcdef', '__') . "\n";
print MergeBetween('__', 'abcdef') . "\n";
print MergeBetween('bb', 'aa') . "\n";
print MergeBetween('aa', 'bb') . "\n";
print MergeBetween('a', 'b') . "\n";
/*
Output:
a_b_cdef
a_b_cdef
baba
abab
ab
*/
希望本文所述对大家的php程序设计有所帮助。