Replace comma within partial string [duplicate] - php

Question

This question already has answers here:
PHP CSV string to array
(10 answers)
Closed 6 years ago.
I have a string like this:
'test', 'test', 'test, test', NULL, NULL, NULL, 123456789012, 0, '2017-02-17', FALSE
I want to explode it into an array.
But this gets messed up when a partial string contains a comma ('test, test').
How can I replace commas within a partial string into some other character? (so explode will work).
Apostrophes in the string must be contained, so str_getcsv() can not be used.

Answer 1

Here's my way:
$string = "'test', 'test', 'test, test, kk', NULL, NULL, NULL, 123456789012, 0, '2017-02-17', FALSE";
$array_tmp = explode(', ', $string);
$array = array();
$index_buffer = NULL;
$index = 0;
foreach($array_tmp as $value) {
// Check if we need to append to buffered entry
if($index_buffer !== NULL){
$array[$index_buffer] .= ', ' . $value;
if($value[strlen($value) - 1] === "'"){
$index_buffer = NULL;
}
continue;
}
// Check if it's not ended string
if(is_string($value) && $value[0] === "'" && $value[strlen($value) - 1] !== "'"){
// It is not ended, set this index as buffer
$index_buffer = $index;
}
// Save value
$array[$index] = $value;
$index++;
}
echo '<pre>' . print_r($array, true);
Output:
Array
(
[0] => 'test'
[1] => 'test'
[2] => 'test, test, kk'
[3] => NULL
[4] => NULL
[5] => NULL
[6] => 123456789012
[7] => 0
[8] => '2017-02-17'
[9] => FALSE
)
Or this may be more suitable but you lose quotes, and I guess, if your input string doesn't respect all csv standards, you could have border effects since str_getcsv handles more things than this quote issue:
str_getcsv($string, ",", "'");

Answer 2

You can do this manually and improve it to support more cases... Try something like this:
$arr = array();
$arr[0] = "";
$arrIndex = 0;
$strOpen = false;
for ($i = 0; $i < mb_strlen($str); $i++){
if ($str[$i] == ',') {
if ($strOpen == false) {
$arrIndex++;
$arr[$arrIndex] = "";
}
else {
$arr[$arrIndex] .= $str[$i];
}
}
else if ($str[$i] == '\'') {
$strOpen = !$strOpen;
}
else {
$arr[$arrIndex] .= $str[$i];
}
}
Result:
Array
(
[0] => test
[1] => test
[2] => test, test
[3] => NULL
[4] => NULL
[5] => NULL
[6] => 123456789012
[7] => 0
[8] => 2017-02-17
[9] => FALSE
)
Note: it will keep "empty" spaces around comas

Answer 3

Try using str_getcsv
str_getcsv($string, ",", "'");