How to convert php string to byte array

How to convert string to byte array in php: First create a PHP sample file; then use the "function strToBytes($string){...}" method to convert string to byte array.

The operating environment of this article: Windows7 system, PHP7.1 version, DELL G3 computer

php How to convert a string to a byte array ?

Conversion between strings and byte arrays in PHP

You often see this type in java:

byte[] IV = { 0, 0, 0, 0, 0, 0, 0, 0 }

Unfortunately, PHP, as a weakly typed language, does not have so many types. The following provides examples of mutual conversion of strings and byte arrays in PHP:

/**
 * Byte数组转字符串
 * @param  array $bytes
 * @return string
 */
function bytesToStr($bytes)
{
    $str = '';
    foreach ($bytes as $ch) {
        $str .= chr($ch);
    }
    return $str;
}
/**
 * 字符串转Byte数组
 * @param  string $string
 * @return array
 */
function strToBytes($string)
{
    $bytes = array();
    for ($i = 0; $i < strlen($string); $i++) {
        $bytes[] = ord($string[$i]);
    }
    return $bytes;
}

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