我测试了循环嵌套的While语句,以便:
$count1 = 0;
while ($count1 < 3) {
$count1++;
$count2 = 0;
echo "count1: ".$count1."<br />";
while ($count2 < 3) {
$count2++;
echo "count2: ".$count2."<br />";
}
}
效果完美(每次循环三遍),结果如下:
count1: 1
count2: 1
count2: 2
count2: 3
count1: 2
count2: 1
count2: 2
count2: 3
count1: 3
count2: 1
count2: 2
count2: 3
然后我尝试使用MysqL_fetch_assoc($ContactsInterests是两行关联数组,而$LatestNews有50行)循环进行同样的操作,即
$CI_count = 0;
while ($CI_Row = MysqL_fetch_assoc($ContactsInterests)) { //loop thru interests
$CI_count++;
$LN_count = 0;
echo "CI_count: ".$CI_count."<br />";
while ($LN_Row = MysqL_fetch_assoc($LatestNews)) { //loop thru news
$LN_count++;
echo "LN_count: ".$LN_count."<br />";
}
}
结果是:
CI_count: 1
LN_count: 1
LN_count: 2
...
LN_count: 50
LN_count: 51
CI_count: 2
但是LN_count的第二次迭代在哪里?我不明白为什么LN_count没有第二次增加.
帮助表示赞赏.
解决方法:
mysql_fetch_assoc对“ MysqL结果”类型进行迭代.寻求每个提取的索引.
您必须使用mysql_data_seek来获得第一个结果,例如;
<?PHP
$CI_count = 0;
while ($CI_Row = MysqL_fetch_assoc($ContactsInterests)) { //loop thru interests
$CI_count++;
$LN_count = 0;
echo "CI_count: ".$CI_count."<br />";
MysqL_data_seek($LatestNews,0);
while ($LN_Row = MysqL_fetch_assoc($LatestNews)) { //loop thru news
$LN_count++;
echo "LN_count: ".$LN_count."<br />";
}
}
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