php method to implement sound playback: 1. Create a PHP sample file; 2. Read the database through PHP; 3. Create an HTML sample file and use H5 audio() to play the prompt sound. .
The operating environment of this article: windows7 system, PHP7.1 version, DELL G3 computer
How does php play sound?
PHP uses H5 audio to achieve sound prompts similar to Meituan orders and music playback effects on web pages
We often do in-site messages and message reminder functions, so how to add on this basis What about the beep? Today I will share with you the entire function implementation process.
First we need to lay out the good news prompt style. Here you can lay it out according to your own needs.
Message prompt bell style.png
After making the message prompt style, we need to start making timers and asynchronous query data.
<script> $(function () { var set = setInterval(function(){ $.post("{:url('prompt')}", '', function(data){ if (data.status){ $('#num').html(data.num); //将消息数量添加上去 var audio = new Audio("./song.ogg"); //获取本地音频文件,ogg,mp3都可以 audio.play(); //执行播放操作 } }, 'json'); }, 1000); //点击查看小心,并且将消息数量清空 $('#a_link').click(function () { $('#num').html(''); }) }) </script>
Here we use H5’s audio() to play the prompt sound. The code I wrote here is very rough, you can optimize it according to your own needs.
Below we use PHP language to read when there are new messages in the database. If there are new messages, start pushing, if not, ignore them. What I am here is based on TP5.1
public function prompt() { //这里插叙是否有新订单,如果有就提示,没有则忽略 $num = Db::name('hexiao')->where('add_time', '>' , date('Y-m-d H:i:s', time()-10))->count(); if ($num > 0){ return json(['status' => 1, 'num' => $num]); } else { return json(['status' => 0, 'num' => $num]); } }
The following introduces the audio tag of H5, which currently supports MP3, Ogg, and Wav
<audio> <source> <source> 您的浏览器不支持 audio 元素。 </source></source></audio>
Execution effect
Execution effect.png
You can also control playback, pause and replay
<audio></audio> <span>播放/暂停</span> <span>重播</span>
You can also control audio playback and pause through js
<script> function repeat(){ var audio = document.getElementById('music'); audio.currentTime = 0;//重新播放 } function control(){ var audio = document.getElementById('music'); if(audio!==null){ if(audio.paused){ audio.play();// 播放 }else{ audio.pause();// 暂停 } } } </script>
The above is Have you learned the complete process?
Recommended learning: "PHP Video Tutorial"
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php把负数转为正整数的方法:1、使用abs()函数将负数转为正数,使用intval()函数对正数取整,转为正整数,语法“intval(abs($number))”;2、利用“~”位运算符将负数取反加一,语法“~$number + 1”。

实现方法:1、使用“sleep(延迟秒数)”语句,可延迟执行函数若干秒;2、使用“time_nanosleep(延迟秒数,延迟纳秒数)”语句,可延迟执行函数若干秒和纳秒;3、使用“time_sleep_until(time()+7)”语句。

php除以100保留两位小数的方法:1、利用“/”运算符进行除法运算,语法“数值 / 100”;2、使用“number_format(除法结果, 2)”或“sprintf("%.2f",除法结果)”语句进行四舍五入的处理值,并保留两位小数。

判断方法:1、使用“strtotime("年-月-日")”语句将给定的年月日转换为时间戳格式;2、用“date("z",时间戳)+1”语句计算指定时间戳是一年的第几天。date()返回的天数是从0开始计算的,因此真实天数需要在此基础上加1。

php判断有没有小数点的方法:1、使用“strpos(数字字符串,'.')”语法,如果返回小数点在字符串中第一次出现的位置,则有小数点;2、使用“strrpos(数字字符串,'.')”语句,如果返回小数点在字符串中最后一次出现的位置,则有。

php字符串有下标。在PHP中,下标不仅可以应用于数组和对象,还可应用于字符串,利用字符串的下标和中括号“[]”可以访问指定索引位置的字符,并对该字符进行读写,语法“字符串名[下标值]”;字符串的下标值(索引值)只能是整数类型,起始值为0。

方法:1、用“str_replace(" ","其他字符",$str)”语句,可将nbsp符替换为其他字符;2、用“preg_replace("/(\s|\ \;||\xc2\xa0)/","其他字符",$str)”语句。

在php中,可以使用substr()函数来读取字符串后几个字符,只需要将该函数的第二个参数设置为负值,第三个参数省略即可;语法为“substr(字符串,-n)”,表示读取从字符串结尾处向前数第n个字符开始,直到字符串结尾的全部字符。


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