Obtain first line of a string in PHP

Question

In PHP 5.3 there is a nice function that seems to do what I want:

strstr(input,"\n",true)

Unfortunately, the server runs PHP 5.2.17 and the optional third parameter of strstr is not available. Is there a way to achieve this in previous versions in one line?

Answer 1

here you go

$str = strtok($input, "\n");

strtok() Documentation

Answer 2

It's late but you could use explode.

<?php
$lines=explode("\n", $string);
echo $lines['0'];
?>

Answer 3

$first_line = substr($fulltext, 0, strpos($fulltext, "\n"));

or something thereabouts would do the trick. Ugly, but workable.

Answer 4

try

substr( input, 0, strpos( input, "\n" ) )

Answer 5

echo str_replace(strstr($input, '\n'),'',$input);

Answer 6

try this:

substr($text, 0, strpos($text, chr(10))

Answer 7

list($line_1, $remaining) = explode("\n", $input, 2);

Makes it easy to get the top line and the content left behind if you wanted to repeat the operation. Otherwise use substr as suggested.

Answer 8

not dependent from type of linebreak symbol.

(($pos=strpos($text,"\n"))!==false) || ($pos=strpos($text,"\r"));

$firstline = substr($text,0,(int)$pos);

$firstline now contain first line from text or empty string, if no break symbols found (or break symbol is a first symbol in text).

Answer 9

You can use strpos combined with substr. First you find the position where the character is located and then you return that part of the string.

$pos = strpos(input, "\n");

if ($pos !== false) {
echo substr($input, 0, $pos);
} else {
echo 'String not found';
}

Is this what you want ?

l.e. Didn't notice the one line restriction, so this is not applicable the way it is. You can combine the two functions in just one line as others suggested or you can create a custom function that will be called in one line of code, as wanted. Your choice.

Answer 10

Many times string manipulation will face vars that start with a blank line, so don't forget to evaluate if you really want consider white lines at first and end of string, or trim it. Also, to avoid OS mistakes, use PHP_EOL used to find the newline character in a cross-platform-compatible way (When do I use the PHP constant "PHP_EOL"?).

$lines = explode(PHP_EOL, trim($string));
echo $lines[0];