/**
* @param string|null $arg
* @return string
* @throws Exception
*/
function toEmacs($arg = null)
{
if (!$arg) {
throw new \Exception('PAS DE ARG');
}
$fileContent = file_get_contents($arg);
$result = [];
$blanks = [];
$blankGroupIndex = 0;
$newLine = true;
$onBlank = false;
$pos = 0;
foreach (str_split($fileContent) as $char) {
if ($newLine) {
$blanks = [];
$blankGroupIndex = 0;
$newLine = false;
$pos = 0;
$onBlank = false;
}
if ($char === ' ' || chr(9) === $char) {
if (!$onBlank) {
$blanks[$blankGroupIndex] = 0;
}
$actualBlankLen = getLen($pos, $char);
$blanks[$blankGroupIndex] += $actualBlankLen;
$pos += $actualBlankLen;
$onBlank = true;
continue;
} elseif ($onBlank) {
$onBlank = false;
$result[] = [' ', $blanks[$blankGroupIndex++]];
}
if ($char === PHP_EOL) {
$newLine = true;
}
$result[] = [$char, 1];
$pos++;
}
$emacsed = '';
foreach ($result as $charData) {
$emacsed .= getRepresentation(0, $charData);
}
return $emacsed;
}
<?php
function getLen(string $str)
{
$len = strlen($str);
if (!$len) {
return 0;
}
$count = 0;
for ($i = 0; $i < $len; $i++) {
if (ord($str[$i]) >= 0x80) {
$i += 2;
//utf-8 3个字节一个中文
//++$i; //gbk 2个字节一个中文
}
++$count;
}
return $count;
}
$str = '中国so好！';
echo getLen($str);
