


PHP intercepts the string and retains the complete xml tag function code_PHP tutorial
/**
* author: goosman
* blog: http://blog.csdn.net/lgg201
* mail: lgg860911@yahoo.com.cn
*/
$str = '01234567890120123456789';
function substr_remain_tag($s, $o, $l) {
$is_match = preg_match_all(<<
#该正则表达式解析xml标签, 标签属性内部支持转义符"\", 支持对"\"自身和对应引号的转义
<(\w+) #标签开始
(?: #属性列表
\s+ #前置空格
\w+ #属性名
\s* #属性名后的空白(为了兼容)
= #属性名值之间的等号
\s* #属性值前的空白(为了兼容)
(?: #属性值(引号处理)
" #双引号的情况
(?:
\\\\\\\\ #吃掉连续两个转义符(表示转义符自身)
\\\\" #吃掉转义符接着一个引号(表示转义的引号)
[^"\\\\]* #其他字符
)*
"
' #单引号情况
(?:
\\\\\\\\ #吃掉连续两个转义符(表示转义符自身)
\\\\' #吃掉转义符接着一个引号(表示转义的引号)
[^'\\\\]* #其他字符
)*
'
)
)*
>
.*? #标签内容
(?1)> #结束标签
;x
heredoc
, $s, $matches, PREG_OFFSET_CAPTURE, $o);
if ( $is_match ) {
foreach ( $matches[0] as $match ) {
$o0 = $match[1];
#标签左边界越过截取目标右边界, 退出
if ( $o0 >= $o + $l ) break;
$o0 + $l0 < $o + $l ) continue; > ) .chr(10);
http://www.bkjia.com/PHPjc/326438.html
www.bkjia.com
true
http: //www.bkjia.com/PHPjc/326438.html
Copy the code as follows: ?php /*** author: goosman * blog: http://blog.csdn.net/lgg201 * mail: lgg860911@yahoo.com.cn*/ $str = '0123456789a012/a0123456789'; function substr_rem...

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