str_split

    (PHP 5, PHP 7, PHP 8)

    str_split — Converte una stringa in una matrice

    Descrizione

    str_split(string $string, int $split_length = ?): array

    Converte una stringa in una matrice. Se viene passato il parametro opzionale split_length, la matrice restituita sarà composta da segmenti, ciascuno della lunghezza di split_length caratteri, in caso contrario ciascun segmento sarà lungo un carattere.

    false è restituito se split_length è minore di 1. Se split_length supera la lunghezza di string, sarà restituita l'intera stringa come primo (ed unico) elemento della matrice.

    Example #1 Esempi di uso di str_split()

    <?php

    $str     = "Hello Friend";

    $arr1 = str_split($str);
    $arr2 = str_split($str, 3);

    print_r($arr1);
    print_r($arr2);

    ?>

    L'output potrà essere: 

    Array
(
    [0] => H
    [1] => e
    [2] => l
    [3] => l
    [4] => o
    [5] =>
    [6] => F
    [7] => r
    [8] => i
    [9] => e
    [10] => n
    [11] => d
)

Array
(
    [0] => Hel
    [1] => lo 
    [2] => Fri
    [3] => end
)

    Example #2 Esempi relativi a str_split()

    <?php

    $str     = "Hello Friend";

    echo     $str{0}; // H
    echo $str{8}; // i

    // Creates: array('H','e','l','l','o',' ','F','r','i','e','n','d')
    $arr1 = preg_split('//', $str, -1, PREG_SPLIT_NO_EMPTY);

    ?>

    Vedere anche: chunk_split(), preg_split(), split(), count_chars(), str_word_count() e for.

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    User Contributed Notes 1 note

    up
    3
    Julian
    2 years ago
    The function str_split() is not 'aware' of words. Here is an adaptation of str_split() that is 'word-aware'.<?php$array =  str_split_word_aware(    'In the beginning God created the heaven and the earth. And the earth was without form, and void; and darkness was upon the face of the deep.',     32);var_dump($array);/**  * This function is similar to str_split() but this function keeps words intact; it never splits through a word.   *  * @return array<int, string>  */function str_split_word_aware(string $string, int $maxLengthOfLine): array{    if ($maxLengthOfLine <= 0) {        throw new RuntimeException(sprintf('The function %s() must have a max length of line at least greater than one', __FUNCTION__));    }        $lines = [];    $words = explode(' ', $string);    $currentLine = '';    $lineAccumulator = '';    foreach ($words as $currentWord) {        $currentWordWithSpace = sprintf('%s ', $currentWord);        $lineAccumulator .= $currentWordWithSpace;        if (strlen($lineAccumulator) < $maxLengthOfLine) {            $currentLine = $lineAccumulator;            continue;        }        $lines[] = $currentLine;        // Overwrite the current line and accumulator with the current word        $currentLine = $currentWordWithSpace;        $lineAccumulator = $currentWordWithSpace;    }    if ($currentLine !== '') {        $lines[] = $currentLine;    }    return $lines;}?>OUTPUT: <?phparray(5) {  [0]=> string(29) "In the beginning God created "  [1]=> string(30) "the heaven and the earth. And "  [2]=> string(28) "the earth was without form, "  [3]=> string(27) "and void; and darkness was "  [4]=> string(27) "upon the face of the deep. "}?>
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