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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 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: me >= '2010-01-01 00:00' AND me < '2011-01-01 00:00'
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 me >= '2010-01-01 00:00' AND me < '2011-01-01 00:00'

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