How to implement ASCII conversion to numerical value in PHP

Title: How to convert ASCII to numerical value in PHP

In PHP programming, you often encounter the situation of converting ASCII code into the corresponding numerical value. ASCII code is a character encoding standard. Each character has a corresponding ASCII code value. The character can be converted into the corresponding numerical value through the ASCII code.

In PHP, the function of converting ASCII to numerical value can be realized through some built-in functions. Several commonly used methods are introduced below and code examples are provided.

Use the ord function

The ord function is a built-in function of PHP, used to obtain the ASCII code value of a character. By passing characters as parameters to the ord function, the corresponding ASCII code value can be obtained.

$char = 'A';
$asciiValue = ord($char);
echo "字符 $char 的ASCII码值为 $asciiValue";

Use the str_split and ord functions together

If you need to convert each character in a string into the corresponding ASCII code value, you can use the str_split function in combination with the ord function.

$str = 'Hello';
$chars = str_split($str);
foreach ($chars as $char) {
    $asciiValue = ord($char);
    echo "字符 $char 的ASCII码值为 $asciiValue
";
}

Use foreach loop and ord function

Another common method is to traverse each character in the string through foreach loop and use the ord function to obtain the ASCII code value of each character .

$str = 'World';
for ($i = 0; $i < strlen($str); $i++) {
    $char = $str[$i];
    $asciiValue = ord($char);
    echo "字符 $char 的ASCII码值为 $asciiValue
";
}

The above are several commonly used methods and code examples for converting ASCII values ​​in PHP. Through these methods, ASCII codes can be easily converted into corresponding values, which plays an important role in programming. Hope the above content is helpful to you.

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