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Found 6 results

  1. Hi Larry! I'm trying to print all sub-category items using my own defined PHP function. There is some thing wrong with this function. Could you please help me to find out the reason why this function doesn’t work. Thanks a lot in advance. <?php include ('connect.php'); include ('head.html'); echo '<div class="categ"><p class="b">Health</p>'; function retrieve_column($parent){ $sql = "SELECT item FROM category WHERE parent = $parent ORDER BY item ASC"; $r = mysqli_query($dbc, $sql); if (!$r) { echo "Couldn’t make a connection to
  2. Hi Larry, It's been a while since I've visited the forums so I hope that all is well with you. I have a question that you have already answered on page 51 and that is to do with the closing ?> The context I have is some php code that optionally 'requires' a php function which is the only thing in the .php file being 'required'. Is there any difference that the .php file which is the function is being optionally 'required' versus just 'required' in the normal code stream? The php file with the function does have the opening <?php tag but it is being included within a p
  3. var obj { var name: 'some value', mtd: function () { alert(name); } } obj.mtd(); The mtd function defined in obj has no defined parameters, but when called the this reference and argument list are passed to the function. Is the name property of obj also present in the mtd function so it can be used in the alert() call as above, or does the mtd function have nothing to do with the property named name? if lerry ullman answer my question than it would be so great
  4. Hi All, I am struggling with the naming of values and a comparison operator. I was fine with how this all worked until I ran into this snippet of code. I am not sure how it works or the logic behind it. function create_radio($value, $name = 'gallon_price') { // Start the element: echo '<input type="radio" name="' . $name .'" value="' . $value . '"'; // Check for stickiness: if (isset($_POST[$name]) && ($_POST[$name] == $value)) { echo ' checked="checked"'; } // Complete the element: echo " /> $value "; Specifically, the comparison value of ($_POS
  5. hi everyone, In the last 4 weeks I've spent A LOT of time with Larry's book and Lynda.com videos (pertaining to PHP). I want to thank Larry for making such a clear and linear guide for PHP beginners. But anyways, I'm working on a small script and I want to list the contents of a directory, make them into hyperlinks, and then edit those hyperlinks to look pretty (I.e. not show an ugly super long path name), then limit the number files echoed back to the browser. I was thinking about using this: <?php $path = "/full/path/to/files"; if ($handle = opendir($path)) { wh
  6. My question (long winded...sorry!): I'm a little confused at exactly how usort works and what it expects from a user created comparison function. According to PHP.net "The comparison function must return an integer less than, equal to, or greater than zero if the first argument is considered to be respectively less than, equal to, or greater than the second." The examples on the same page use the following function to do a very simple numeric comparison: function cmp($a, $b){ if ($a == $b) { return 0; } return ($a < $b) ? -1 : 1; } This would return either a +ve, -ve o
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