主页
PHP
PHP 正则表达式
tryphp_regex_n2
运行 ❯
×
更改方向
保存代码
更改主题
<!DOCTYPE html> <html> <body> <h1>Regex Modifier: o{3}</h1> <p>How many occurences of 3 preceeding o's (ooo) are in the text "freew3c is goood"?:</p> <?php $txt = "freew3c is goood"; $pattern = "/o{3}/"; echo preg_match_all($pattern, $txt); ?> <p>The matches were found here:</p> <?php echo preg_replace($pattern, "#", $txt); ?> <p>(Each match was replaced by a # character)</p> </body> </html>
正则表达式修饰符：o{3}
在文本“W3Schools is goood”中有多少个前导 o（ooo）的 3 次出现？
1
匹配项在此处找到
freew3c is g#d
（每次匹配都替换为“#”字符）