How to get a recuring parts from a file in php - php

Question

I have a file file.txt. This file has portions and parts that recur throughout the file. I
am trying to read the parts between the last and the first key words.
I have managed to get the first and the last key words but I can't read the lines between the key words.
Here is my script
$file=file('file.txt');
$begin = 'first_line';
$end='last_line';
foreach ($file as $lineNumber => $line) {
$lineNumber++;
if (strpos($line,$begin))
{
echo $lineNumber.$line."<br/>";
}
elseif (strpos($line,$end))
{
echo $value."<br/>";
}
echo $lineNumber. $line."<br/>";
}
Please some one assist me.

Answer 1

Here you go:
$lines=file('data.txt');
$begin = 'first_line';
$end='last_line';
$switch = false;
$content = "";
foreach ($lines as $line_num => $line) {
if(strpos($line, $begin) !== false) {$switch = true;continue;}
if(strpos($line, $end) !== false) $switch = false;
if(!$switch) continue;
$content .= "Line #<b>{$line_num}</b> : " . htmlspecialchars($line) . "<br />\n";
}
echo $content;

Answer 2

This will do it:
$file = file('file.txt');
$begin = 'first_line';
$end = 'last_line';
$isInside = false;
foreach ($file as $lineNumber => $line)
{
$lineNumber++;
if (!(strpos($line,$begin)===false))
$isInside = true;
if ($isInside)
echo $lineNumber." : ".$line."<br/>";
if (!(strpos($line,$end)===false))
$isInside = false;
}
Some points:
You were displaying everything regardless, my script only shows lines between $begin and $end.
Your comparison is case-sensitive
You had a major bug using strpos and assuming it returns true if it matches. It could also return 0 if the string matches at the beginning,hence using === to catch this. See the disclaimer on the strpos page.

Answer 3

$file=fopen("welcome.txt","r");
while(!feof($file))
{
$open=fgets($file);
print $open;
}
fclose($file);