CODEWITHSUNDEEP
phpstr-replaceline-breaks
sg552
sg552

Reputation: 1543

Ignore break line with str_replace

The code below will replace certain text. Actually I get the $str data from a text file with file_get_contents so please imagine there's a new line in the $str.

$str = 'From: My Name <[email protected]>
        To: [email protected]
        Message-ID: <[email protected]>';

$old = array("My Name", "To: [email protected]");
$new   = array("New Name", "");
echo str_replace($old, $new, $str );

Output: 

From: New Name 

Message-ID: <[email protected]>

Unfortunately after removing To: [email protected], the code will create a line break. How can I use str_replace without creating new break line?

Upvotes: 0

Views: 479

Answers (3)

Rizier123
Rizier123

Reputation: 59691

It doesn't create a new line, it's just left from your str_replace().

So if you want to remove every line which only contains new line characters you can use this:

(Here I first replace the $old with the $new, after this I explode() the string by new line characters. Then I use array_map() combined with trim() to remove these characters (["", "\t", "\n", "\r", "\0", "\x0B"]) from every line. Then I remove all remaining empty lines with array_filter() and at the end I implode() the string again)

echo $str = implode(PHP_EOL,
                array_filter(
                    array_map("trim",
                        explode(PHP_EOL, str_replace($old, $new, $str))
                    )
                )
            );

Upvotes: 2

Wieczo
Wieczo

Reputation: 465

str_replace does not add a new line break; it replaces the string with what you supported and you told it to replace the text in the line with an empty string. The easiest way is to include the line break in your search array:

$old = array("My Name", "To: [email protected]\n");

Upvotes: 1

RiggsFolly
RiggsFolly

Reputation: 94662

Like you said you get this from a text file and if what you show is what is in the text file then it is not creating a newline character, it is actually you that is not removing the already existing new line.

Try 

$str = 'From: My Name <[email protected]>
        To: [email protected]
        Message-ID: <[email protected]>';

$old = array("My Name", "To: [email protected]\n");
$new = array("New Name", "");

Upvotes: 1

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