//strstr:从左向右查找 返回值:字符串 //strrchr:从右向左查找 返回值:字符串 //strpos:从左向右查找 返回值:整型,假如查找的字符串不存在,则返回空 //strrpos:从右向左查找 返回值:整型 $str="天高任鸟飞,海阔凭鱼跃";//strstr:从左向右查找 strrchr:从右向左查找 echo "原始字符串:".$str." "; echo "用strstr函数搜索“,”的返回结果:".strstr($str,",")." "; echo "用strstr函数搜索“鸟飞”的返回结果:".strstr($str,"鸟飞")." "; $str1="I have a great dream."; echo "原始字符串:".$str1." "; echo "用strrchr函数搜索“e”的返回结果:".strrchr($str1,"e")." "; echo "用strrchr函数搜索“ea”的返回结果:".strrchr($str1,"ve")." "; $str2="I am an abstract about abroad."; echo "原始字符串为:".$str2." "; echo "ab在字符串中的第一次出现位置为:".strpos($str2,"ab")." "; echo "ab在字符串中的第一次出现位置为:".strpos($str2,"am")." "; echo "abcd在字符串中第一次出现的位置为:".strpos($str2,"aman")." "; $str3="I am is wang hui."; echo "原始字符串为:".$str3." "; echo "I在字符串中的最后一次出现位置为:".strrpos($str3,"I")." "; echo "an在字符串中的最后一次出现位置为:".strrpos($str3,"an")." "; echo "i在字符串中最后一次出现的位置为:".strrpos($str3,"i"); ?> |