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PHP vs JS Loose Comparisons with '=='
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>Problem, Boole?</title> | |
| <style> | |
| body { | |
| font-family: Verdana, Geneva, sans-serif; | |
| } | |
| td { | |
| padding: 5px; | |
| } | |
| thead tr td { | |
| text-align: center; | |
| } | |
| .th_color { | |
| background-color: MediumPurple; | |
| } | |
| tbody tr td { | |
| background-color: WhiteSmoke; | |
| } | |
| .td_diff { | |
| background-color: LightCoral; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <?php | |
| $a = array( | |
| true, | |
| false, | |
| 1, | |
| 0, | |
| -1, | |
| "1", | |
| "0", | |
| "-1", | |
| null, | |
| array(), | |
| "php", | |
| "" | |
| ); | |
| $al = array( | |
| "TRUE", | |
| "FALSE", | |
| 1, | |
| 0, | |
| -1, | |
| "\"1\"", | |
| "\"0\"", | |
| "\"-1\"", | |
| "NULL", | |
| "array()", | |
| "\"php\"", | |
| "\"\"" | |
| ); | |
| ?> | |
| <table> | |
| <thead> | |
| <tr> | |
| <td colspan="13">PHP vs. JS Loose comparisons with ==</td> | |
| </tr> | |
| <tr class="th_color"> | |
| <td></td><?php foreach ($al as $v) { | |
| echo "<td>" . $v . "</td>"; | |
| } ?></tr> | |
| </thead> | |
| <tbody> | |
| <?php | |
| foreach ($a as $i => $r) { | |
| echo " <tr>"; | |
| foreach ($a as $j => $c) { | |
| echo ($j ? "" : "<td>" . $al[$i] . "</td>") . "<td>" . ($r == $c | |
| ? "TRUE" : "FALSE") . "</td>"; | |
| } | |
| echo "</tr>\n"; | |
| } | |
| ?> | |
| </tbody> | |
| </table> | |
| <script | |
| src="//cdnjs.cloudflare.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> | |
| <script> | |
| $(function () { | |
| var a = [true, false, 1, 0, -1, "1", "0", "-1", null, [], "js", ""]; | |
| $.each(a, function (i, r) { | |
| $.each(a, function (j, c) { | |
| var d = $('tbody tr:nth-child(' + (i + 1) + ') td:nth-child(' + (j + 2) + ')'); | |
| if (d.text() !== (r == c ? "TRUE" : "FALSE")) d.addClass('td_diff'); | |
| }); | |
| }); | |
| }); | |
| </script> | |
| <p style="width: 800px"> | |
| NOTE: The comparison texts(TRUE/FALSE) are all PHP == comparisons, the red | |
| table cells are where the JavaScript == comparisons differ from the PHP == | |
| ones. | |
| </p> | |
| </body> | |
| </html> |
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