Excerpt isn't working with file contents

$excerpt= excerpt(file_get_contents("data/file.txt"), 30);
echo $excerpt;

function excerpt($str, $chars){
    $index = strripos($str, ' ');
    return substr($str, 0, $index)."...";
}

It don't return the text stripped at the 30 characters or less. It returns the whole text without the last word and the dots added but if you use a string typed manually it works p开发者_StackOverflow社区erfect.

Why this isn't working if content is loaded from a text file? I think that the /n's are broking the strripos.

You want to use stripos, not strripos.

<?php

$excerpt= excerpt(file_get_contents("data/file.txt"), 30);
echo $excerpt;

function excerpt($str, $chars){
    $index = stripos($str, " ", $chars);
    return substr($str, 0, $index)."...";
}

?>

The problem is not related to the stripos usage. As I can see you're trying to trim the string at 30 characters without cutting words in half. In order to do that you need to correct your excerpt function:

function excerpt($str, $chars) {
//no need to trim, already shorter than wanted dimension    
if (strlen($tr) <= $chars) {        
    return $str;    
}       

//find last space within wanted dimension   
$last_space = strrpos(substr($str, 0, $chars), ' ');    
$trimmed_text = substr($str, 0, $last_space);

return $trimmed_text . '...';
}

and yes, your function doesn't even use the $chars param...

I gues you want an excerpt with as many whole words as possible. Some tips:

If you only just want the first 3o chars you should not read the whole file!

What you should do: read only to the maximum excerpt lenght and then format it.

function readExcerpt($path){
    $fhand = fopen($path,"r");
    $excerpt = fread($fhand ,30);
    fclose($fhand);
    return $excerpt;
}

    function fromatExcerpt($excerpt){
       //remove last word/word fragment
       $index = strripos($excerpt,' ');
       if($index!==false){
          $excerpt= substr($excerpt,0,$index);
       }
       return $excerpt.'...';  
    }

    echo fromatExcerpt(readExcerpt("D:\hotfix.txt"));