PHP 教程：从文本文件生成带有汇总行的 HTML 表格

name:Ivan,Salary:5000,town:Sofia,age:20
name:Pesho,Salary:1500,town:Pleven,age:19
name:Gosho,Salary:2000,town:Varna,age:18
name:Georgi,Salary:3000,town:Pleven,age:46
name:Ivailo,Salary:6000,town:Pleven ,age:25
name:Stamat,Salary:7000,town:Varna,age:46
name:Aleksandar,Salary:1500,town:Burgas,age:44
name:Kiko,Salary:5000,town:Plovdiv,age:25
name:Misho,Salary:5250,town:Sofia,age:24
name:Daniel,Salary:3000,town:Plovdiv,age:34
name:John,Salary:6000,town:Pleven,age:50
name:Ana,Salary:9000,town:Sofia,age:18
name:Maria,Salary:9500,town:Sofia,age:30
name:Marian,Salary:9500,town:Sofia,age:20
name:Petko,Salary:9500,town:Sofia,age:19
name:Nikola,Salary:9500,town:Sofia,age:45
name:Ani,Salary:9500,town:Sofia,age:47

<?php

$file = fopen('name.txt', "r");
$names = [];
$cities = [];
$salaries = [];
$ages = [];

echo "<table border=\"1px\">";
echo "<tr><th>Name</th><th>Salary</th><th>Town</th><th>Age</th></tr>";

while (!feof($file)) {
    $string = fgets($file);
    $finalArray = [];

    $asArr = explode(',', $string);
    foreach ($asArr as $val) {
        $tmp = explode(':', $val);
        $finalArray[$tmp[0]] = trim($tmp[1] ?? ""); // 使用 null 合并运算符并trim
    }

    $cols = array_values($finalArray);
    [$name, $salary, $city, $age] = $cols; // 使用列表赋值

    $names[] = $name;
    $salaries[] = $salary;
    $cities[] = $city;
    $ages[] = $age;

    echo '<tr>';
    foreach ($cols as $col) {
        echo '<td>' . $col . '</td>';
    }
    echo '</tr>';

}

//计算汇总行
$countOfNames = count(array_unique($names));
$citiesCount = array_count_values($cities);
$maxVal = max($citiesCount);
$mostCommonCity = array_search($maxVal, $citiesCount);
$sumOnAllSalary = array_sum($salaries);
$averageAges = (int)(array_sum($ages) / count($ages));

echo '<tr>';
echo '<td>' . $countOfNames . '</td>';
echo '<td>' . $sumOnAllSalary . '</td>';
echo '<td>' . $mostCommonCity . '</td>';
echo '<td>' . $averageAges . '</td>';
echo '</tr>';

echo "</table>";

fclose($file);

?>