Online PHP editor | output for Lv4o4

@ 2016-09-24T06:28:43Z

<?php

$str = <<<STR
category1_subcat_1
category1_subcat_2
category1_subcat_3
category2_subcat_1
category2_subcat_2
category3_subcat_1
category3_subcat_3
STR;

// Explode the string, with a newline as the delimiter
$lines = explode("\n", $str);
// Init the category array
$cats = [];
// iterate over the lines
foreach($lines as $currentLine) {
    // Match category{DIGIT} using regular exp
    preg_match("/category[0-9]/", $currentLine, $match);
    // Remove the $match from the current line
    $currentLine = str_replace($match[0], "", $currentLine);
    // Push the element to the categories array, and also remove the
    // the underscores (_)
    $cats[$match[0]][] = str_replace("_", "", $currentLine);
}
var_dump($cats);

Output for 5.6.0 - 5.6.26, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0 - 8.5.1: array(3) { ["category1"]=> array(3) { [0]=> string(7) "subcat1" [1]=> string(7) "subcat2" [2]=> string(7) "subcat3" } ["category2"]=> array(2) { [0]=> string(7) "subcat1" [1]=> string(7) "subcat2" } ["category3"]=> array(2) { [0]=> string(7) "subcat1" [1]=> string(7) "subcat3" } }
Output for 8.4.15: /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.

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