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<?php function breadcrumb($array) { $output = []; foreach ($array as $key => $value) { if (is_array($value)) { foreach (breadcrumb($value) as $breadcrumb) { $output[] = $key . ' > ' . $breadcrumb; } } else { $output[] = $key; } } return $output; } $array = [ 'note' => [ 'to' => [ 'user' => [ 'name' => 'First user', ], 'abc' => 123, 'lmn' => 4582, ], 'from' => 'Jani', 'heading' => 'Reminder', 'body' => [ 'abc' => 123 ] ] ]; var_dump(breadcrumb($array));
Output for 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 - 8.3.4, 8.3.6 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0 - 8.5.1
array(6) { [0]=> string(23) "note > to > user > name" [1]=> string(15) "note > to > abc" [2]=> string(15) "note > to > lmn" [3]=> string(11) "note > from" [4]=> string(14) "note > heading" [5]=> string(17) "note > body > abc" }
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.
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 array(6) { [0]=> string(23) "note > to > user > name" [1]=> string(15) "note > to > abc" [2]=> string(15) "note > to > lmn" [3]=> string(11) "note > from" [4]=> string(14) "note > heading" [5]=> string(17) "note > body > abc" }

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