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@ 2019-11-20T21:09:41Z

<?php

$array["\r\nNo quotation marks:\r\n"] = 'Column1|Column2|Column3|Column4';
$array["\r\nQuotation marks on every column:\r\n"] = '"Column1"|"Column2"|"Column3"|"Column4"';
$array["\r\nQuotation marks on first column only:\r\n"] = '"Column1"|Column2|Column3|Column4';
$array["\r\nQuotation marks on last column only:\r\n"] = 'Column1|Column2|Column3|"Column4"';
$array["\r\nQuotation marks around empty first column:\r\n"] = '""|Column2|Column3|Column4';
$array["\r\nQuotation marks around empty middle column:\r\n"] = 'Column1|""|Column3|Column4';
$array["\r\nQuotation marks around empty last column:\r\n"] = 'Column1|Column2|Column3|""';
$array["\r\nUnescaped quotation marks:\r\n"] = '"Column"1""|Column2|Column3|Column4';
$array["\r\nEscaped quotation marks:\r\n"] = '"Column\"1\""|Column2|Column3|Column4';

$delimiter = '\\|';
$enclosure = '"';

foreach($array as $id => $row){
    echo $id;
    echo $row."\r\n";
    $row = preg_replace("/(?:(?<=^|{$delimiter}){$enclosure})|(?:{$enclosure}(?=$|{$delimiter}))/",'',$row);
    echo $row."\r\n";
}

Output for git.master, git.master_jit, rfc.property-hooks: No quotation marks: Column1|Column2|Column3|Column4 Column1|Column2|Column3|Column4 Quotation marks on every column: "Column1"|"Column2"|"Column3"|"Column4" Column1|Column2|Column3|Column4 Quotation marks on first column only: "Column1"|Column2|Column3|Column4 Column1|Column2|Column3|Column4 Quotation marks on last column only: Column1|Column2|Column3|"Column4" Column1|Column2|Column3|Column4 Quotation marks around empty first column: ""|Column2|Column3|Column4 |Column2|Column3|Column4 Quotation marks around empty middle column: Column1|""|Column3|Column4 Column1||Column3|Column4 Quotation marks around empty last column: Column1|Column2|Column3|"" Column1|Column2|Column3| Unescaped quotation marks: "Column"1""|Column2|Column3|Column4 Column"1"|Column2|Column3|Column4 Escaped quotation marks: "Column\"1\""|Column2|Column3|Column4 Column\"1\"|Column2|Column3|Column4

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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