function QpContentEncoder::standardize

Make sure CRLF is correct and HT/SPACE are in valid places.

1 call to QpContentEncoder::standardize()

QpContentEncoder::encodeString in vendor/symfony/mime/Encoder/QpContentEncoder.php

Encode a given string to produce an encoded string.

File

vendor/symfony/mime/Encoder/QpContentEncoder.php, line 42

Class

QpContentEncoder

@author Lars Strojny

Namespace

Symfony\Component\Mime\Encoder

Code

private function standardize(string $string) : string {
    // transform CR or LF to CRLF
    $string = preg_replace('~=0D(?!=0A)|(?<!=0D)=0A~', '=0D=0A', $string);
    // transform =0D=0A to CRLF
    $string = str_replace([
        "\t=0D=0A",
        ' =0D=0A',
        '=0D=0A',
    ], [
        "=09\r\n",
        "=20\r\n",
        "\r\n",
    ], $string);
    return match (\ord(substr($string, -1))) {    0x9 => substr_replace($string, '=09', -1),
        0x20 => substr_replace($string, '=20', -1),
        default => $string,
    
    };
}