$char = '上海;北京;天津;重庆;香港;澳门;台湾;';function char_jx($char,$delimiter)
{
$char = rtrim($char,$delimiter);
$element = explode($delimiter,$char);
$arr[0] = substr_count($char,$delimiter);
$arr[1] = $element;
return $arr;
}
$d = char_jx($char,';');
print_r($d);exit;
{
$char = rtrim($char,$delimiter);
$element = explode($delimiter,$char);
$arr[0] = substr_count($char,$delimiter);
$arr[1] = $element;
return $arr;
}
$d = char_jx($char,';');
print_r($d);exit;
preg_match_all($regx, $char, $match);
return $match[1];
}
手册里有详细的例子
<?php
// \\2 是一个逆向引用的例子,其在 PCRE 中的含义是
// 必须匹配正则表达式本身中第二组括号内的内容,本例中
// 就是 ([\w]+)。因为字符串在双引号中,所以需要
// 多加一个反斜线。
$html = "<b>bold text</b><a href=howdy.html>click me</a>";preg_match_all ("/(<([\w]+)[^>]*>)(.*)(<\/\\2>)/", $html, $matches);for ($i=0; $i< count($matches[0]); $i++) {
echo "matched: ".$matches[0][$i]."\n";
echo "part 1: ".$matches[1][$i]."\n";
echo "part 2: ".$matches[3][$i]."\n";
echo "part 3: ".$matches[4][$i]."\n\n";
}
?>