grep 'Advisory' --after-context=2 weather-data-advisory-temp.txt

 alert=$(grep 'Advisory' --after-context=2 weather-data-advisory-temp.txt)

> python3
Python 3.9.18 (main, Sep 15 2023, 12:58:45) 
[GCC 13.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> with open( "weather-data-advisory-temp.txt", "r" ) as infile:
...     for line in infile:
...             if "Advisory" in line:
...                     line2 = infile.readline()
...                     line3 = infile.readline()
...                     print( line, end="" )
...                     print( line2, end="" )
...                     print( line3, end="" )
... 
Weather Advisory ended for:
* City of Ottawa

>>>

alert="$(grep 'Advisory' --after-context=2 weather-data-advisory-temp.txt)"

<?php
alert="$(grep 'Alerts for: Ottawa North - Kanata - Orléans' --after-context=4 weather-data-advisory-temp.txt)"
echo "<h2>" . $alert . "</h2>";
?>

# Normally NOT needed for a var=value assignment:
alert=$(grep --after-context=2 'Advisory' weather-data-advisory-temp.txt)
# But needed in commands, like the echo command:
echo "$alert"

echo "Matches:
$(grep --after-context=2 'Advisory' weather-data-advisory-temp.txt)"

$alert= shell_exec('grep ...');
...

$filedata = file_get_contents("/path/to/weather-data-advistory-temp.txt");

preg_match_all( "/Weather Advisory.*(?:\n[^\r\n]+){0,6}/" , $filedata , $alert );

echo $alert[0][0];

>?php
$filedata = file_get_contents("I did put in the path to weather-data-advistory-temp.txt");

preg_match_all( "/Weather Advisory.*(?:\n[^\r\n]+){0,6}/" , $filedata , $alert );

echo $alert[0][0];
?>

>?php $filedata = file_get_contents("/home/www/localhost/htdocs/scripts/weather-data-advistory.txt"); preg_match_all( "/Weather Advisory.*(?:\n[^\r\n]+){0,6}/" , $filedata , $alert ); echo $alert[0][0]; ?>

<?php …

#!/usr/bin
#!/bin/bash
#!/usr/sbin
cd path to script
alert="$(grep 'Warnings' --after-context=7 weather-data-advisory.txt)"
echo "$alert" > find-warnings.txt

<?php
$message=0;
$filename = "/path to txt file/find-warnings.txt";
$message = file_get_contents($filename);
if (empty($message))
{
echo "No Alerts in Effect";
}
else
{
echo "$message";
}
?>