執行 ❯
獲取您
自己的 PHP
伺服器
×
更改方向
更改主題，深色/淺色
前往 Spaces
<!DOCTYPE html> <html> <body> <h1>Regex Modifier: ^W3</h1> <p>Does the text "W3Schools", start with "W3"?:</p> <?php $txt = "W3Schools"; $pattern = "/^W3/"; echo preg_match_all($pattern, $txt); ?> <p>This method returns 1 if there is a match, otherwise 0.</p> <p>The matches were found here:</p> <?php echo preg_replace($pattern, "#", $txt); ?> <p>(The match was replaced by a # character)</p> </body> </html>
正則表示式修飾符：^W3
文字“W3Schools”是否以“W3”開頭？
1
如果匹配成功，此方法返回 1，否則返回 0。
匹配項在此處找到
#Schools
（匹配項已被 # 字元替換）
