Bash webpage checker, put in cronjob to check if website is up or not

WebPageCheck.sh

#!/bin/bash

# WebPage checker
# ping 4 times in 5 seconds to check site uptime
# change webpage & EMAIL vars

badpings=()
str="unknown host"
webpage="www.yoursite.com"
EMAIL="youremail@gmail.com"

for ((i=0; i<3; i++))
do
        ping_res=$(ping -c 1 $webpage 2>&1);
        if [[ $ping_res == *"$str"* ]]
                then
                badpings+=(1)
        fi
        sleep 5  
done

tot=0
for i in ${badpings[@]}; do
        let tot+=$i
done

if [ "$tot" -ge "3" ]
        then
        echo "The site $webpage may be down and not responding" | mail -s "$webpage (http) failed" $EMAIL
fi