dynamic tables using php

<?php
$table_name = rtrim($table_name);
// get count of table rows
$result = $conn->query("select count(*) from $table_name");
$numrows = $result->fetch_array()[0] ?? '';
mysqli_free_result($result);
$numrows = htmlentities($numrows,ENT_QUOTES,'UTF-8');
$headers = $conn->query("SHOW COLUMNS FROM $table_name");
$tableArr = array();
while($row1 = mysqli_fetch_assoc($headers)) {
    $tableArr[] = $row1['Field'];
}
// shift the array to remove the 'id' column
array_shift($tableArr);
// convert the array in a comma delimited list
$table_data = implode('`,`', $tableArr);
// place back ticks around query string (allows for spaces in field names)
$table_data = "`{$table_data}`";
// build the table
build_header($conn,$numrows,$table_name,$table_data);

function build_header($conn,$numrows,$table_name,$table_data) {
        if ($numrows >= "1") {
                $query_header = ("SELECT $table_data FROM $table_name LIMIT 1");
                $header=mysqli_query($conn,$query_header);
                // open table
                echo "<!-- begin table construct -->\n";
                echo "<table class=\"center\">\n";
                        foreach( $header as $key => $value ) {
                        if( is_array($value) ) {
                        echo "<tr>\n";
                        // populate the column headers
                foreach($value as $key => $column) {
                        echo "<th>".$key."</th>\n";
                        }
                        echo "</tr>\n";
                        } else {
                        echo "<th>No header information available</th>\n";
                        }
                }

                // table data
                $query_header = ("SELECT $table_data FROM $table_name");
                $header=mysqli_query($conn,$query_header);
                foreach( $header as $key => $value ) {
                        if( is_array($value) ) {
                        echo "<tr>\n";
                foreach($value as $key => $column) {
                        echo "<td>{$column}</td>\n";
                        }
                        echo "</tr>\n";
                        } else {
                        echo "<td>{$value}</td>\n";
                        }
                }
                // close table
                echo "</table>\n";
                echo "<!-- end table construct -->\n";
                mysqli_free_result($header);
                } else {
                echo "No entries found in table: $table_name\n";
                }
}
?>