php:count字符串出现在mySql数组中的次数

<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";

// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);

// 检测连接
if ($conn->connect_error) {
  die("连接失败: " . $conn->connect_error);
}

// 查询字符串出现的次数
$sql = "SELECT COUNT(*) as count FROM myTable WHERE columnName LIKE '%php:count%'";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
  // 输出数据
  while($row = $result->fetch_assoc()) {
    echo "字符串出现次数: " . $row["count"];
  }
} else {
  echo "0 结果";
}
$conn->close();
?>