Question

我有一个分配，其表单将ID和姓氏作为输入。我想同时使用ID和姓氏，并将其与文本文件匹配。如果匹配，则在表格中显示该学生。如果不匹配，则回显未找到学生。到目前为止，我几乎完成了所有工作，但每当我搜索一个存在的学生时，找不到的学生就会得到回应。

以下是我的表单的链接：http://hills.ccsf.edu/~ryan/a7p1.php

以下是您可以从中获取ID和姓氏的学生。第一列是学生ID，第二列是姓氏：http://fog.ccsf.edu/~tboegel/showclass.php

以下是代码：

<?php                                                                                                                      

$lname = $_REQUEST['lname'];                                                                                               
$id = $_REQUEST['id'];

function DisplayRow($ID) {                                                                                                 
    print "<tr>\n";
    $parts = split(":", $ID);                                                                                              
    for($i=0; $i <=7; $i++) {                                                                                              
    print "<td>$parts[$i]</td>\n";                                                                                     
    }
    print "</tr>\n";                                                                                                       
}

$handle = fopen("class.txt", "r");                                                                                         
$line = fgets($handle);
while(!feof($handle)) {                                                                                                    
    $part = explode(":", $line);                                                                                           
    if($id == $part[0] && $lname == $part[1]) {                                                                            
        echo "<table border='1' width='95%'>                  
        <tr>                                                                                                               
          <th>Student ID</th>                                                                                                
          <th>Student Last Name</th>                                                                                         
          <th>Student First Name</th>
          <th>Midterm 1</th>                                                                                                 
          <th>Midterm 2</th>
          <th>Midterm 3</th>
          <th>Final Exam</th>                                                                                                
          <th>Letter Grade</th>
        </tr>";
        DisplayRow($line);
    } else {
        print "The person you are trying to search for does not exist";
        die;
    }
    $line = fgets($handle);
}
fclose($handle);
print "</table>\n";
?>

Answer 1

你的问题很简单.....你过早地终止了循环

else {
        print "The person you are trying to search for does not exist"; //??
        die;
    }    ^--------------- This your issue (Remove)

更好使用SQLite或MySQL等数据库

另请注意，split已弃用，我建议您使用explode

$parts = split(":", $ID);  
           ^-------------  Change to explode

Answer 2

直到它找到了什么，然后它打破了... 如果达到eof，则会触发错误

<?php                                                                                                                      

$lname = $_REQUEST['lname'];
$id = $_REQUEST['id'];

function DisplayRow($ID) {
    print "<tr>\n";
    $parts = split(":", $ID);
    for($i=0; $i <=7; $i++) {
        print "<td>$parts[$i]</td>\n";
    }
    print "</tr>\n";
}
$found = false;
$handle = fopen("class.txt", "r");
$line = fgets($handle);
while(!feof($handle)) {
    $part = explode(":", $line);
    if($id == $part[0] AND $lname == $part[1]) {
     echo "<table border='1' width='95%'>
        <tr>
            <th>Student ID</th>
            <th>Student Last Name</th>
            <th>Student First Name</th>
            <th>Midterm 1</th>
            <th>Midterm 2</th>
            <th>Midterm 3</th>
            <th>Final Exam</th>
            <th>Letter Grade</th>
        </tr>";

        DisplayRow($line);

        echo "</table>";
        $found = true;
        break; //no need to go further already found the data
    }
    $line = fgets($handle);
}
if($found == false) {
    echo "The person you are trying to search for does not exist";
}
fclose($handle);

?>

PHP搜索学生ID和姓氏

2 个答案: