<form id="frm" method="post" action="./example/">
        <input type="hidden" name="example" value="data">
        <button type="submit" class="btn btn-primary">Submit1</button>
    </form>
    <form method="post" action="./example/">
        <input type="hidden" name="example" value="data">
        <button id="btn" type="submit" class="btn btn-primary">Submit2</button>
    </form>    
    <form method="post" action="./example/" onsubmit="return func1()" >
        <input type="hidden" name="example" value="data">
        <button type="submit" class="btn btn-primary">Submit3</button>
    </form>
    <form method="post" action="./example/"  >
        <input type="hidden" name="example" value="data">
        <button type="submit" class="btn btn-primary" onclick="return func2()" >Submit4</button>
    </form>

//例１
document.getElementById("frm").addEventListener("submit",function(event){
    event.preventDefault();
});
//例２
document.getElementById("btn").addEventListener("click",function(event){
    event.preventDefault();
    event.stopPropagation();//インターフェイスのメソッドで、キャプチャおよびバブリング段階において現在のイベントのさらなる伝播を阻止します。 
});
//例３
function func1(){
    return false;
}
//例４
function func2(){
    return false;
}

//functionで無名関数
var mumei1 = function(a){
	return a;
};
console.log(mumei1(123));
//アロー関数で無名関数
var mumei2 = (a)=>{
	return a;
};
console.log(mumei2(123));
//functionで即時関数
console.log((function(a){
	return a;
})(123));
//アロー関数で即時関数
console.log(
((a)=>{
	return a;
})(123));

using System;
using System.Runtime.CompilerServices;

namespace img_dl_bing_sss
{
    class Program
    {
        static void Main(string[] args)
        {
            string keyword = "",R18="";
            Console.ForegroundColor = ConsoleColor.Red;
            Console.WriteLine("処理中は画面や立ち上がったブラウザを閉じないでください。\n" +
                "処理が完了すると「***終了します***」と表示されます。\n" +
                "何かキーを押し終了してください\n\n");


            Console.ForegroundColor = ConsoleColor.Green;
            Console.WriteLine("↓検索キーワードを入力しエンターを押してください");
            keyword = Console.ReadLine();
            Console.ForegroundColor = ConsoleColor.White;
            Console.WriteLine("↓R指定ですか?\nY or N かの文字を入力しエンターを押してください");
            R18 = Console.ReadLine();
            Console.ForegroundColor = ConsoleColor.Yellow;
            Console.WriteLine("***画像のダウンロード量（画像数ではありません） 1?999 ***");
            var scroll = 9999;
            try
            {
                scroll = int.Parse(Console.ReadLine());
                if(scroll >=1 && scroll <= 999)
                {
                    scroll = scroll * 9999;
                }
            }
            catch
            {
                Console.ForegroundColor = ConsoleColor.Yellow;
                Console.WriteLine("***検索キーワードが不適切です。***");
            }
            SuiteTests img =  new SuiteTests();
            if (img.Imgdlok(keyword, R18, scroll))
            {
                img.Dispose();
            }
            else {
                Console.ForegroundColor = ConsoleColor.Yellow;
                Console.WriteLine("***検索キーワードが不適切です。***");
            }
            Console.ForegroundColor = ConsoleColor.Yellow;
            Console.WriteLine("***終了します***");
            
        }
    }
}

// Generated by Selenium IDE
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using OpenQA.Selenium;
using OpenQA.Selenium.Chrome;
using OpenQA.Selenium.Firefox;
using OpenQA.Selenium.Remote;
using OpenQA.Selenium.Support.UI;
using OpenQA.Selenium.Interactions;
using Xunit;
using AngleSharp;
using AngleSharp.Html.Parser;
using AngleSharp.Html.Dom;
using AngleSharp.Dom;
using System.Runtime.InteropServices;
using Newtonsoft.Json;
using System.IO;
using System.Net;

public class SuiteTests : IDisposable {
  public IWebDriver driver {get; private set;}
  public IDictionary<String, Object> vars {get; private set;}
  public IJavaScriptExecutor js {get; private set;}
  public SuiteTests()
  {
    driver = new ChromeDriver();
    js = (IJavaScriptExecutor)driver;
    vars = new Dictionary<String, Object>();
  }
  public void Dispose()
  {
    driver.Quit();
  }
  public bool Imgdlok(string keyword="", string R18= "",int scroll = 999999)
    {
        if (keyword == "") return false;
        Console.Clear();
        string path = System.IO.Directory.GetCurrentDirectory() + "\\IMG\\";
        if (!Directory.Exists(path))
        {
            Directory.CreateDirectory(path);
        }
        driver.Navigate().GoToUrl("https://www.bing.com/?scope=images&nr=1&FORM=NOFORM");
        driver.Manage().Window.Size = new System.Drawing.Size(945, 1030);
        driver.FindElement(By.Id("sb_form_q")).Click();
        driver.FindElement(By.Id("sb_form_q")).SendKeys(keyword);
        driver.FindElement(By.CssSelector(".search.icon.tooltip")).Click();
        try
        {
            if (R18 == "Y")
        {
            driver.FindElement(By.LinkText("設定の変更")).Click();
            driver.FindElement(By.CssSelector("#settings_safesearch div:nth-child(3)")).Click();
            driver.FindElement(By.Id("adlt_set_off")).Click();
            driver.FindElement(By.Id("sv_btn")).Click();
            driver.FindElement(By.Id("adlt_confirm")).Click();
        }
        }
        catch
        {
            Console.ForegroundColor = ConsoleColor.Yellow;
            Console.WriteLine("***R指定ではありません***");
        }
        try
        {
            double ps = 0;
                for (int i = 99; i < scroll;i+=1000)
            {

                js.ExecuteScript("window.scrollTo(0," + i + ")");
                Console.CursorLeft = 0;
                ps = (double)(((double)i / (double)scroll) * 100);
                Console.Write("処理中::{0:D2}%",(int)ps);
            }
        }
        catch
        {
            Console.ForegroundColor = ConsoleColor.Yellow;
            Console.WriteLine("***Max画像まで到達しました***");
        }
        Console.ForegroundColor = ConsoleColor.White;
        Console.WriteLine("\n***ダウンロード処理開始***\n");
        int cnt = 0;
        var elm = driver.FindElements(By.ClassName("iusc"));
        driver.Manage().Window.Minimize();
        foreach (var e in elm) {
           dynamic jsondata = JsonConvert.DeserializeObject(e.GetAttribute("m"));
            Console.ForegroundColor = ConsoleColor.Red;
            Console.WriteLine((string)jsondata.murl + "::wait.....");
            string imgurl = (string)jsondata.murl;
            if(4 <= Path.GetExtension(imgurl).Length && Path.GetExtension(imgurl).Length <= 5)
            {
                try
                {
                    cnt++;
                    string ext = Path.GetExtension(imgurl);
                    WebClient myWebClient = new WebClient();
                    myWebClient.DownloadFile(imgurl, path + "No-" + cnt + "-" + keyword + ext);
                    myWebClient.Dispose();
                    Console.ForegroundColor = ConsoleColor.Cyan;
                    Console.WriteLine("***" + cnt +"::" + imgurl + "\n::ダウンロード中、画面を閉じないでください...***");
                    Console.ForegroundColor = ConsoleColor.Green;
                    Console.WriteLine("***" + cnt + "::ダウンロード済***");
                }
                catch
                {
                    Console.ForegroundColor = ConsoleColor.Yellow;
                    Console.WriteLine("***ダウンロードが失敗しました***");
                }

            }else{
                Console.ForegroundColor = ConsoleColor.Yellow;
                Console.WriteLine("***画像の拡張子が不明のためダウンロードが失敗しました***");
            }
        }
        Console.ForegroundColor = ConsoleColor.Blue;
        Console.WriteLine("***ダウンロード完了しました***\n" + path);
        return true;
  }
}

dnf --enablerepo=PowerTools install oniguruma-devel

./configure \
--prefix=/var/www/php-7.4.6  \
--with-config-file-path=/var/www/php-7.4.6 \
--with-config-file-scan-dir=/var/www/php-7.4.6 \
--with-zip \
--enable-gd \
--with-jpeg \
--with-xpm \
--with-zlib \
--with-gettext \
--enable-bcmath \
--enable-sockets \
--enable-opcache \
--enable-exif \
--with-curl \
--with-bz2 \
--enable-calendar \
--enable-inline-optimization \
--with-expat \
--enable-mbstring \
--enable-mbregex \
--with-freetype \
--with-openssl \
--with-mysqli \
--with-pdo-mysql \
--with-mysql-sock=/var/lib/mysql/mysql.sock

sed -i -e "s/utf8mb4/utf8/g" mysql.sql