我有一个名为$questions的关联数组。为了参考，我打印出这个数组的前四个元素。实际阵列相当大，但所有阵列元素都与下面打印的元素相似：
Array
(
[0] => Array
(
[question_id] => 33185
[question_parent_id] => 0
[question_subject_id] => 4
[question_topic_id] => 503
[question_directions] =>
[question_text] => Two gases are at 300 K and 350 K respectively Ratio of average kinetic energy of their molecules is
[question_file] =>
[question_description] =>
[question_difficulty_type] => 1
[question_has_sub_ques] => 0
[question_picked_individually] => no
[question_appeared_count] => 0
[question_manual] => 0
[question_site_id] =>
[question_created_staff_id] => fbfee12504bf3c4a038d4c9f142f894e
[question_added_date] => 1328180210
[question_updated_staff_id] =>
[question_updated_date] => 0
)
[1] => Array
(
[question_id] => 33187
[question_parent_id] => 0
[question_subject_id] => 4
[question_topic_id] => 503
[question_directions] =>
[question_text] => what will be the temperature when the rms velocity is double the rms velocity at 300 K
[question_file] =>
[question_description] =>
[question_difficulty_type] => 1
[question_has_sub_ques] => 0
[question_picked_individually] => no
[question_appeared_count] => 0
[question_manual] => 0
[question_site_id] =>
[question_created_staff_id] => fbfee12504bf3c4a038d4c9f142f894e
[question_added_date] => 1328180274
[question_updated_staff_id] =>
[question_updated_date] => 0
)
[2] => Array
(
[question_id] => 33188
[question_parent_id] => 0
[question_subject_id] => 4
[question_topic_id] => 503
[question_directions] =>
[question_text] => a gas at 300 K has pressure 4 × 10-10 N/m 2 If k = 1.38 × 10-23 J/K the number of molecules./ cm3 of the order of
[question_file] =>
[question_description] =>
[question_difficulty_type] => 1
[question_has_sub_ques] => 0
[question_picked_individually] => no
[question_appeared_count] => 0
[question_manual] => 0
[question_site_id] =>
[question_created_staff_id] => fbfee12504bf3c4a038d4c9f142f894e
[question_added_date] => 1328180400
[question_updated_staff_id] => 1096ab29ecde5cec198bb2ebe730d229
[question_updated_date] => 1338272917
)
[3] => Array
(
[question_id] => 33190
[question_parent_id] => 0
[question_subject_id] => 4
[question_topic_id] => 503
[question_directions] =>
[question_text] => The rms speed of oxygen molecules at a certain temperature is v if the temperature is doubled and the oxygen gas dissociates into atomic oxygen, the rms speed would be
[question_file] =>
[question_description] =>
[question_difficulty_type] => 1
[question_has_sub_ques] => 0
[question_picked_individually] => no
[question_appeared_count] => 0
[question_manual] => 0
[question_site_id] =>
[question_created_staff_id] => fbfee12504bf3c4a038d4c9f142f894e
[question_added_date] => 1328180486
[question_updated_staff_id] => 1096ab29ecde5cec198bb2ebe730d229
[question_updated_date] => 1338273032
)
)
我有另一个名为$excluding_this的数组。打印此数组后，我们得到以下输出：
Array ( [0] => a [1] => at [2] => is [3] => are [4] => when [5] => whom )
现在我想做的是，我必须解析数组$questions的每个数组元素，并访问包含在键['question_text']中的字符串。在这个字符串中，我必须检查数组$excluding_this中的任何字符串是否存在于字符串（包含在['question_text']键中的字符串）中。如果['question_text']值中存在任何或所有字符串/s，则从键['question_text']的值中删除所有这些字符串，并且应该返回具有这些更改的['question_text']的新数组。我不知道我应该如何以最佳方式实现这一点。有谁能帮我解决这个问题吗？任何形式的帮助都将不胜感激。正在等待您的答复。
这就是我构建它的方式。在foreach过程中跳过排除的条目。所以你不必两次穿过你的大阵列。
foreach ( $array1 as $arr ) {
foreach ( $excluding_this as $excludeString )
if ( strpos($arr['question_text'], $excludeString )
$arr['question_text'] = str_replace($excludeString, '', $arr['question_text']);
...
// rest of the code
...
}
根据需要进行更改。。
$excluding_this = array("a","at","is","are","when","whom");
foreach($questions as $arr) {
foreach($excluding_this as $excluding) {
if(strpos($arr['question_text'],$excluding)) {
$arr['question_text'] = str_replace($excluding, "", $arr['question_text'];
}
}
}