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<!DOCTYPE html> <html> <body> <?php $people = array("Bill", "Steve", "Mark", "David", 23); if (in_array("23", $people, TRUE)) { echo "匹配成功<br>"; } else { echo "未找到匹配<br>"; } if (in_array("Glenn",$people, TRUE)) { echo "匹配成功<br>"; } else { echo "未找到匹配<br>"; } if (in_array(23,$people, TRUE)) { echo "匹配成功<br>"; } else { echo "未找到匹配<br>"; } ?> </body> </html>