json-to-array-value-test.php

<?php

$string = '{"emptyString":"","stringSpace":" ","zeroInteger":0,"zeroString":"0","nullVal":null,"falseVal":false,"emptyArray":[]}';
$array = json_decode( $string, true );

echo $string;
echo'<pre>';print_r( $array );echo'</pre>';

echo '<table>';
echo '
<tr>
	<th></th>
	<th>!empty</th>
	<th>isset</th>
	<th>!null</th>
	<th>true</th>
</tr>';

foreach ( $array as $key => $value ) {
	echo '<tr><td>'.$key.': </td><td>';
	echo ( !empty( $value ) ) ? 'true' : 'false'; echo '</td><td>';
	echo ( isset( $value ) ) ? 'true' : 'false'; echo '</td><td>';
	echo ( !is_null( $value ) ) ? 'true' : 'false'; echo '</td><td>';
	echo ( $value ) ? 'true' : 'false';
	echo '</td></tr>';
}
echo '<tr><td>iDontExist: </td><td>';
echo ( !empty( $array['iDontExist'] ) ) ? 'true' : 'false'; echo '</td><td>';
echo ( isset( $array['iDontExist'] ) ) ? 'true' : 'false'; echo '</td><td>';
/* echo ( !is_null( $array['iDontExist'] ) ) ? 'true' :false; */
echo 'error'; echo '</td><td>';
/* echo ( $array['iDontExist'] ) ? 'true' :false; */ 
echo 'error'; echo '</td></tr>';
echo '<tr><td>_</td></tr>';

echo '</table>';