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@ 2015-03-23T15:57:51Z

<?php

function field_field($date, $field) {
	// Format yyyy-mm-dd or yyyy-mm or yyyy
	$length = strlen($date);
	if ( $length >= 4 ) {
		$year = substr($date, 0, 4);
		if ( $length >= 7 ) {
			$month = substr($date, 5, 2);
			if ( $length >= 9 ) {
				$day = substr($date, 8, 2);
				$start = "$year-$month-$day 00:00";
				$day = str_pad(++$day,2,'0',STR_PAD_LEFT);
				$end = "$year-$month-$day 00:00";
			} else {
				$start = "$year-$month-01 00:00";
				$month = str_pad(++$month,2,'0',STR_PAD_LEFT);
				$end = "$year-$month-01 00:00";
			}
		} else {
			$start = "$year-01-01 00:00";
			$year = str_pad(++$year,2,'0',STR_PAD_LEFT);
			$end = "$year-01-01 00:00";
		}
		return "$field >= '$start' AND $field < '$end'";
	} else {
		return ' 1=1 ';
	}
}

echo field_field( '2010', 'me');

Output for git.master, git.master_jit, rfc.property-hooks: me >= '2010-01-01 00:00' AND me < '2011-01-01 00:00'

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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