close

 

<?php
$mixed = mb_regex_encoding(
"UTF-8"
? // [string $encoding]
);

$string = mb_ereg_replace (
"[i]"
, // string $pattern
"I"
, // string $replacement
"i have a big car"
, // string $string
// [string $option = "msr"]
);
?>

結果
$mixed = true
$string = 'I have a bIg car'

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