PHP - str_pad

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Metóda - str_pad

(PHP 4 >= 4.0.1, PHP 5, PHP 7)

str_pad() is used to pad a string to the requested length using characters from the $pad_string parameter. If $pad_string contains more than 1 characters, characters are alternated.

<?php echo str_pad("hello", 28, "-|", STR_PAD_BOTH); ?>

The string can be padded from right (STD_PAD_RIGHT, default), from left (STD_PAD_LEFT) or from both sides (STD_PAD_BOTH).

If STD_PAD_BOTH is set and the number of chars to pad is odd, the left padding is 1 character shorter then the right padding.

<?php echo str_pad("hello", 8, "_", STR_PAD_BOTH); ?>

If $pad_length is less or equal to the length of the input string, the input string is returned unchanged.

Procedurálne

• function str_pad (int $pad_length, string $pad_string = ) : string

Parametre

Názov	Dátový typ	Predvolená hodnota	Popis
$pad_length	int		The requested length of the output. If is shorter than the length of the original string, the original string is returned intact.
$pad_string	string		The characters to be used as the padding.

Mávratovej hodnoty

Vracia: string

Returns the padded input string.

Príklady

<?php echo str_pad("ITnetwork.cz", 20, "-");                // ITnetwork.cz-------- ?>

<?php echo str_pad("ITnetwork.cz", 20, "-", STR_PAD_LEFT);  // --------ITnetwork.cz ?>

<?php echo str_pad("ITnetwork.cz", 20, "-", STR_PAD_BOTH);  // ----ITnetwork.cz---- ?>

<?php echo str_pad("TOMAS", 40, "mynameis", STR_PAD_BOTH);  ?>

---

<?php
    echo "| " . str_pad("Income", 12) . "|" . str_pad(426, 20, " ", STR_PAD_LEFT) . " USD |\n";
    echo "| " . str_pad("Expense", 12) . "|" . str_pad(-6952, 20, " ", STR_PAD_LEFT) . " USD |\n";
    echo "| " . str_pad("Total", 12) . "|" . str_pad(-6526, 20, " ", STR_PAD_LEFT) . " USD |\n";

?>

Adding leading zeros to a number:

<?php
    $rand = 456;
    // We want to have a 6-digit number
    echo str_pad($rand, 6, "0", STR_PAD_LEFT);
?>