PHP 将数组提取键值后转为 json 数据格式

在开发短信群发项目时，短信接口数据接收为 json 格式，需要将数据库查询获得的遍历数组提取键值后再转为 json 数据格式，通过以下方式来实现：

数组数据：

<?php
$sms_list = array (
	array (
		"phoneNumber" => 13500000000,
		"SignName" => "SignName1",
		"TemplateCode" => "SMS_165000001"
	),
	array (
		"phoneNumber" => 13600000000,
		"SignName" => "SignName2",
		"TemplateCode" => "SMS_165000002"
	),
	array (
		"phoneNumber" => 13700000000,
		"SignName" => "SignName3",
		"TemplateCode" => "SMS_165000003"
	),
	array (
		"phoneNumber" => 13800000000,
		"SignName" => "SignName4",
		"TemplateCode" => "SMS_165000004"
	) 
);

处理方法：

// 获取手机号 json 数据
$phoneNumber = array_column($sms_list, phoneNumber);
$phoneNumber_json = json_encode($phoneNumber);
echo $phoneNumber_json;
echo '<br>';

// 获取签名 json 数据
$SignNamer = array_column($sms_list, SignName);
$SignNamer_json = json_encode($SignNamer);
echo $SignNamer_json;
echo '<br>';

// 获取短信模板 json 数据
$TemplateCode = array_column($sms_list, TemplateCode);
$TemplateCode_json = json_encode($TemplateCode);
echo $TemplateCode_json;
echo '<br>';

输出结果：

[13500000000,13600000000,13700000000,13800000000]
["SignName1","SignName2","SignName3","SignName4"]
["SMS_165000001","SMS_165000002","SMS_165000003","SMS_165000004"]