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Convert PostgreSQL array to PHP array

I have trouble reading Postgresql arrays in PHP. I have tried explode(), but this breaks arrays containing commas in strings, and str_getcsv() but it's also no good as PostgreSQL doesn't quote the Japanese strings.

Not working:

explode(',', trim($pgArray['key'], '{}'));
str_getcsv( trim($pgArray['key'], '{}') );

Example:

// print_r() on PostgreSQL returned data: Array ( [strings] => {または, "some string without a comma", "a string, with a comma"} )
// Output: Array ( [0] => または [1] => "some string without a comma" [2] => "a string [3] => with a comma" ) 
explode(',', trim($pgArray['strings'], '{}'));
// Output: Array ( [0] => [1] => some string without a comma [2] => a string, with a comma ) 
print_r(str_getcsv( trim($pgArray['strings'], '{}') ));

Answer*

Reliable function to parse PostgreSQL (one-dimensional) array literal into PHP array, using regular expressions:

<?php

 function pg_array_parse($literal)
 {
 if ($literal == '') return;
 preg_match_all('/(?<=^\{|,)(([^,"{]*)|\s*"((?:[^"\\\\]|\\\\(?:.|[0-9]+|x[0-9a-f]+))*)"\s*)(,|(?<!^\{)(?=\}$))/i', $literal, $matches, PREG_SET_ORDER);
 $values = [];
 foreach ($matches as $match) {
 $values[] = $match[3] != '' ? stripcslashes($match[3]) : (strtolower($match[2]) == 'null' ? null : $match[2]);
 }
 return $values;
 }

 print_r(pg_array_parse('{blah,blah blah,123,,"blah \\"\\\\ ,{100円\x40\t\daő\ő",NULL}'));
 // Array
 // (
 // [0] => blah
 // [1] => blah blah
 // [2] => 123
 // [3] =>
 // [4] => blah "\ ,{@@ daőő
 // [5] =>
 // )

 var_dump(pg_array_parse('{,}'));
 // array(2) {
 // [0] =>
 // string(0) ""
 // [1] =>
 // string(0) ""
 // }

 print_r(pg_array_parse('{}'));
 var_dump(pg_array_parse(null));
 var_dump(pg_array_parse(''));
 // Array
 // (
 // )
 // NULL
 // NULL

 print_r(pg_array_parse('{または, "some string without a comma", "a string, with a comma"}'));
 // Array
 // (
 // [0] => または
 // [1] => some string without a comma
 // [2] => a string, with a comma
 // )

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Convert PostgreSQL array to PHP array

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