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PHP - Shorthand Object Creation Syntax ( Obj->property )
*Mods* PLEASE don't move this to the OOP section again. I've had no luck there, and it's not specifically an OOP question.
Hi everyone, I just want to know if there's a shorthand way to create objects, as there is for arrays: Code: [Select] // shorthand array creation $foo = array( 'bar' => 0, 'baz' => array ( 'name' => 'Dave', 'gender' => 'male' ) ) Code: [Select] // is there a way to do this with objects? // not that I know so far... $foo = object( bar->0, 'baz' -> object ( name -> 'Dave', gender -> 'male' ) ) I find object-access syntax is often quicker and easier to write than array-access syntax. Have I missed something obvious that I can't just write it out this way? Cheers, Dave Similar TutorialsHey all, I want to have an object that has a property which is an object containing instances of other objects. I try this: Code: [Select] class Blog extends Posts { public $has_posts; public function __construct($a,$b,$c){ $has_posts = (object) array_merge((array) $a, (array) $b, (array) $c); } } class Posts { public $b; public function __construct($b){ $this->b = $b; } } $post1 = new Posts(1); $post2 = new Posts(2); $post3 = new Posts(3); $blog = new Blog($post1,$post2,$post3); var_dump($blog->has_posts); //null foreach($blog->has_posts as $post){ //Invalid argument supplied for foreach() echo $post->b; } But as you see, has_posts is null, not an object containing other objects. Thanks for response. Hi All,
I've been interested in writing a PHP pdo configuration file so that I can include connections in various files on my site. While I was looking up some possible solutions I stumbled across an interesting post on stack overflow http://stackoverflow...-pdo-connection
The first responder suggested the code below. However, I don't understand how to access the connection and make query calls. I'm confused by how it's possible to return a variable name as an object { return new $name( $this->connection ) }.
Also, If someone could explain what the author means by { $something = $factory->create('Something');}. Wouldn't the "Something" need to be a class? And how would that class get the db connection?
All the best,
Karma
$provider = function()
{
$instance = new PDO('mysql:......;charset=utf8', 'username', 'password');
$instance->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$instance->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
return $instance;
};
class StructureFactory
{
protected $provider = null;
protected $connection = null;
public function __construct( callable $provider )
{
$this->provider = $provider;
}
public function create( $name)
{
if ( $this->connection === null )
{
$this->connection = call_user_func( $this->provider );
}
return new $name( $this->connection );
}
}
$factory = new StructureFactory( $provider );
$something = $factory->create('Something');
$foobar = $factory->create('Foobar');
I've been getting this error message: Trying to get property of non-object in /application/controllers/index.php on line 37 Here is line 37 $this->view->title = $pageInfo[0]->title; any help would be much appreciated. Hi all, I have a script which I coded not long ago which works fine but there is one error which says: Notice: Trying to get property of non-object in /home/www/***-*****.com/hts.php on line 374 I carnt see why its showing the error. $fetch2=mysql_query("SELECT crew FROM users WHERE username='$username'") or die (mysql_error()); $fetch1 = mysql_fetch_object($fetch2); $crewrep1=mysql_query("SELECT * FROM crews WHERE name='$fetch1->crew'") or die (mysql_error()); $crewrep = mysql_fetch_object($crewrep1); $result = $rep + $reps; $result55 = $crewrep->rep + $reps; // Line 374 Can anyone else see why its showing the error? Thanks for your help. Hello, I'm currently in the process of trying to learn php. I've been working on an issue with something I am trying to code from a book I purchased "PHP and MySQL Web Development 5th Ed." by Luke Welling and Laura Thomson. So far the book has been great, but I'm trying to figure out using MySQL and php. When I try to run this particular script for a query for a book store, I get the error: Notice: Trying to get property of non-object in C:\php-book\ch11\results.php on line 37. This is the code: Code: [Select] $query = "select * from books where ".$searchtype."like '%".$searchterm."%'"; $result = $db->query($query); $num_results = $result->num_rows; echo "<p>Number of books found: ".$num_results."</p>"; for($i=0; $i<$num_results; $i++) { $row = $result->fetch_assoc(); echo "<p><strong>".($i+1).". Title: "; echo htmlspecialchars(stripslashes($row['title'])); echo "</strong><br />Author: "; echo stripslashes($row['author']); echo "<br /> ISBN: "; echo stripslashes($row['isbn']); echo "<br />Price: "; echo stripslashes($row['price']); echo "</p>"; } $result->free(); $db->close(); Line 37 is specifically: $num_results = $result->num_rows; I've been bashing my head for a couple of hours here, thank you in advance to whoever can offer any help. Hi Guys Trying to get xml elements to display in a html table using the following code Code: [Select] <?php session_start(); include_once('includes/connect_inc.php'); $file="https://www.cdlvis.com/lookup/getxml?username=username&mode=test&key=password&vrm=".$_POST['veh_reg'].""; $dom=new DOMdocument(); $dom->load($file); $xml=simplexml_import_dom($dom); ?> and Code: [Select] <form name="vehicle_details" method="post" action="add_vehicle.php"> <table> <tr> <td>Registration Number:</td><td><input name="reg_num" type="text" value="<?php echo $xml->result[0]->vrm;?>" readonly="true" /></td></tr> <tr> <td>Make:</td><td><input name="make" type="text" value="<?php echo $xml->result[0]->make;?>" readonly="true" /></td></tr> <tr> <td>Model:</td><td><input name="model" type="text" value="<?php echo $xml->result[0]->model;?>" readonly="true" /></td></tr> <tr> <td>Date of Manufactu </td><td><input name="date_man" type="text" value="<?php echo $xml->result[0]->date_manufactured;?>" readonly="true" /></td></tr> <tr> <td>Date of First Registration:</td><td><input name="date_reg" type="text" value="<?php echo $xml->result[0]->first_registered;?>" readonly="true" /></td></tr> <tr> <td>Colour:</td><td><input name="colour" type="text" value="<?php echo $xml->result[0]->colour;?>" readonly="true" /></td></tr> <tr> <td>Body Style:</td><td><input name="body" type="text" value="<?php echo $xml->result[0]->body;?>" readonly="true" /></td></tr> <tr> <td>Number of Doors:</td><td><input name="doors" type="text" value="<?php echo $xml->result[0]->doors;?>" readonly="true" /></td></tr> <tr> <td>Engine Size:</td><td><input name="engine_size" type="text" value="<?php echo $xml->result[0]->engine_size;?>" readonly="true" /></td></tr> <tr> <td>Fuel Type:</td><td><input name="fuel_type" type="text" value="<?php echo $xml->result[0]->fuel;?>" readonly="true" /></td></tr> <tr> <td>Gearbox Type:</td><td><input name="gearbox" type="text" value="<?php echo $xml->result[0]->gearbox_type;?>" readonly="true" /></td></tr> <tr> <td>Previous Keepers:</td><td><input name="keepers" type="text" value="<?php echo $xml->result[0]->previous_keepers;?>" readonly="true" /></td></tr> <tr> <td>BHP:</td><td><input name="bhp" type="text" value="<?php echo $xml->result[0]->smmt_power_bhp;?>" readonly="true" /></td></tr> <tr> <td>Emissions:</td><td><input name="co2" type="text" value="<?php echo $xml->result[0]->smmt_co2;?>" readonly="true" /></td></tr> <tr> <td><input name="try_again" type="button" value="Try Again" /></td><td><input name="submit" type="submit" value="Next Stage" /></td></tr> </table> </form> What have I done wrong? I am trying to run a count query and faced with the error: Notice: Trying to get property of non-object in Not sure how to resolve this error in these lines:
if($result->num_rows > 0){
while($row = $result->fetch_rows()){
Code:
<?php
$sql = "SELECT
Form_Group
COUNT(Presence LIKE '/') AS Present,
COUNT(Presence LIKE 'N') AS Absent,
FROM 'attendance'";
$result = $conn->query($sql);
?>
<?php
//Fetch Data form database
if($result->num_rows > 0){
while($row = $result->fetch_rows()){
?>
<tr>
<td><?php echo $row['Form_Group']; ?></td>
<td><?php echo $row['Present']; ?></td>
<td><?php echo $row['Absent']; ?></td>
</tr>
<?php
}
}
else
{
?>
<tr>
<th colspan="6">There's No data found!!!</th>
</tr>
<?php
}
?>
Keep getting this error from line 19 (Notice: Trying to get property of non-object in /clientdata/zeus-dynamic-1/s/o/blahblah/www/tyson/onion.php on line 18)... have no idea how to get rid of it. Do I have to use isset? If so.. where??? (obviously I've replaced site address with website) Code: [Select] include('simple_html_dom.php'); $story = array(); getArticles('website'); function getArticles($page) { global $story, $desc, $read; $html = new simple_html_dom(); $html->load_file($page); $items = $html->find('div[id=story_content]'); foreach($items as $post) { $story[] = array($post->children(0)->plaintext, $post->children(2)->next_sibling()->innertext, $post->children(4)->innertext); } } $i = 0; foreach($story as $item) { $syurl = str_replace('href="', 'href="http://website', $item[2]); echo '<p class="storytitle">' . $item[0] . '</p>'; echo '<p class="storyexcerpt">' . $item[1] . '</p>'; echo '<p class="storyread">' . $syurl . '</p>'; if (++$i == 3) break; } Any ideas? This line is causing the issue: $story[] = array($post->children(0)->plaintext, $post->children(2)->next_sibling()->innertext, $post->children(4)->innertext); Likewise, it does post the 3 storys below the 2 error lines...? We have a complex, json object which is multiple levels deep. We need to search for a given property/key in the entire object (not just first occurrence, but all), and if we find the property, return where in the object each property exists, so we can modify the properties value. Figure it needs to be recursive. So I'm getting a "Notice: Trying to get property of non-object in" error when I'm trying to pull data from a xml. I have a complete xml that has all of the potential node that it could ever have and it loads up fine -no errors, but when I load a different xml that doesn't have all of the possible nodes it returns this error several times here is a sample of my code: $source = 'TestFile.xml'; $xml = new SimpleXMLElement($source,null,true); $result = mysql_query("SELECT * FROM tblvalues") or die(mysql_error()); //Return the table row by row while($row = mysql_fetch_array($result)) { $curblk = substr($row['fldelement'],0,3); switch ($row['fldelement']){ case "E06_04": case "E06_05": case "E06_07": case "E06_08": $cursub = $curblk."_04_0"; $xmlVal = $xml->Header->Record->$curblk->$cursub->$row['fldelement']; //grab value from xml break; ... ... ... // the cases go on for a while... ... case "E07_05": case "E07_06": case "E07_07": case "E07_08": $cursub = $curblk."_03_0"; $cursub2 = $curblk."_05_0"; $xmlVal = $xml->Header->Record->$curblk->$cursub->$cursub2->$row['fldelement']; //this is the line that the error points to break; ... ... ... And here is the sample of the xml that returns the error: Code: [Select] <E07> <E07_01>-20</E07_01> <E07_02>0</E07_02> <E07_15>-25</E07_15> <E07_16>-25</E07_16> <E07_17>-25</E07_17> <E07_18_0> <E07_18_01> <E07_18>-20</E07_18> <E07_19>-20</E07_19> <E07_20>-20</E07_20> </E07_18_01> .... .... .... The obvious problem (to me) is that my code is trying to return a value from a nonexistent xml node, for example: $xmlVal = $xml->Header->Record->$curblk->$cursub->$cursub2->$row['fldelement']; is looking for: $xmlVal = $xml->Header->Record->E07->E07_03_0->E07_05_0->E07_05 Ok, I get that, so how do I rewrite this so it's not blowing up on something so simple? Quick notes: -This same code works for a more complete xml -Rewriting the xmls is not an option as I have no control over those Edit: Almost forgot, thanks! I want to save class property values and want to write these in the database after being called from another function. Code: [Select] class model{ public $dbh; public $user_arr=array('username','password','email','location','interest','homepage'); public function insert_data() { $sql = "INSERT INTO account VALUES ('" .$user_info['username']."','".$user_info['password'] ."','".$user_info['email']."', 'user','".$user_info['location']."','".$user_info['interests'] ."','".$user_info['homepage']."')"; //if(isset($data)) echo $sql; } public function data_approoved($user){ //$user_info = new array(); $user_arr['username'] = $user['username']; $user_arr['password'] = $user['password']; $user_arr['email'] = $user['email']; $user_arr['location'] = $user['location']; $user_info['interests'] = $user['interests']; $user_info['homepage'] = $user['homepage']; Model::insert_data(); } } }//class ended The approoved_data function is supposed to set the values of $user_info array which should be later on stored in database. Please somebody help me. I have a Soup object in a Bowl object in a Microwave object. The Microwave object has the methods: receiveItem(Bowl $b) cookItem(???) I want the Microwave to be able to set the Soup->temperature but I'm not how to do that? Make sense? TomTees This topic has been moved to Application Frameworks. http://www.phpfreaks.com/forums/index.php?topic=323395.0 Hi, I have an output of print_r he
Google_Service_Calendar_Acl_Resource Object
(
[stackParameters:Google_Service_Resource:private] => Array
(
[alt] => Array
(
[type] => string
[location] => query
)
[fields] => Array
(
[type] => string
[location] => query
)
[trace] => Array
I am wondering what is the right syntax to create the instance and set the variables?
Thanks,
Ted
I get the following error when I try to pass a value to a methiod in a loop: Warning: Attempt to assign property of non-object in /Users/staceyschaller/Sites/dev_zone/ckwv2/classes/class.php on line 670 This one has me very baffled. It will work the first time, and seems to work every other time, so I have no clue what is wrong. Here is the code: This code is part of my "display" class: function display_partner ($type,$loc,$rand=0,$narrow=0) { $this->partners = new partner($this->cxn); $display = ' <div id="cont_info" class="partner-list"> <div> <h3 class="settings">'.ucfirst($loc).' '.ucfirst($type).last_letter($type).'s</h3> </div> <div class="settings-value" style="height:12px;padding:0;margin:0;text-align:right;padding-right:10px;"> <a href="" class="trunc">Add your organization to this list</a></p> </div> <div style="height:2px;padding:0;margin:0;"> <hr class="account" /> </div> '; $ids = $this->partners->get_partners_list($type,$loc,$rand); for ($b=0;$b<sizeof($ids->id);$b++) { $this->partnerID = $ids->id[$b]; $display .= ($narrow)? $this->card_partner_narr():$this->card_partner(); if ($b!=(sizeof($ids->id)-1)) { $display .= '<hr class="account" />'; } } if (sizeof($ids->id)==0) { $display .= '<div style="color:#999999;display:line;text-align:center;height:20px;">No Partners found for '.ucfirst($loc).' '.ucfirst($type).'</div>'; } $display .= ' </div>'; return $display; } function card_partner () { $this->partners->set_partner_id($this->partnerID); $part_info = $this->partners->get_partner_info(); if ($part_info) { $display .= ' <table class="settings"> <tr> '.$this->show_if($part_info['partLogo']['val'],'<td class="settings-value" rowspan="2"><img src="'.LOGO_FOLDER.$part_info['partLogo']['val'].'" '.resize_img(LOGO_FOLDER.$part_info['partLogo']['val'],175).'alt="'.$part_info['partName']['val'].'" /></td>').' <td class="settings-value" colspan="2"><h5>'.$part_info['partName']['val'].'</h5></td> </tr> <tr> <td class="settings-value"> <span style="color:999999;">'.$part_info['partAddress']['val'].'<br /> '.$part_info['partCity']['val'].', '.$part_info['partST']['val'].' '.$part_info['partZIP']['val'].'<br /> '.$part_info['partPhone']['val'].'</span><br /> <a href="'.$this->form->show_href($part_info['partWeb']['val']).'" target="_blank">'.$part_info['partWeb']['val'].'</a> </td> <td class="settings-value">'.$part_info['partInfo']['val'].'</td> </tr> </table> '; } return $display; } This code is part of my "partners" class: function set_partner_id($partID) { echo '<p>partID: '.$partID.' '.gettype($partID).'<br> $this->partner->id: '.$this->partner->id.'</p>'; $this->partner->id = $partID; ///*** ERROR HAPPENS HERE ***/ echo '<p>id set: '.$this->partner->id.'<br> $this->partner->id: '.$this->partner->id.'</p><hr>'; } function get_partner_id() { return $this->partner->id; } // gets user info at login function get_partner_info() { $this->partner = $this->cxn->proc_info('partner','partID',$this->partner->id);//$this->partner->id return $this->partner; } The following is the output generated: partID: 24 string $this->partner->id: id set: 24 $this->partner->id: 24 partID: 26 string $this->partner->id: Warning: Attempt to assign property of non-object in /Users/staceyschaller/Sites/dev_zone/ckwv2/classes/class.php on line 670 id set: $this->partner->id: partID: 17 string $this->partner->id: id set: 17 $this->partner->id: 17 partID: 25 string $this->partner->id: Warning: Attempt to assign property of non-object in /Users/staceyschaller/Sites/dev_zone/ckwv2/classes/class.php on line 670 id set: $this->partner->id: As you can see, the value passes to $this->set_partner_id($partID) each time. It is formatted as a string. When it assigns the value to $this->partner->id, however, sometimes it works, and sometimes it doesn't. It's probably something obvious, but I've racked my brain to see what it is. Any ideas? I always have trouble reading shorthand statements, as i am used to always using brackets. So when i view someones code and they use shorthand, i get confused. Can i get a clear explanation on the example below:
if ( have_posts() ) : while ( have_posts() ) : the_post(); the_content(); endwhile; else: echo "<p>Sorry, no posts matched your criteria.</p>"; endif;I've always been accustomed to using brackets, so i have trouble understanding the above quickly. Please bear with me in the following exercise. I'm fairly new to php (but not coding) and am trying to push my skills for the future, so I'm going beyond a problem for which I already have a solution to see if I understand the coding principles correctly. I am trying to understand just how far I can push the ternary operator shorthand. I know how to do simple tasks, but I'm wondering if I can perform more than one command in the same statement? I'm a little confused because I'd like to both set a session variable and do a page redirect and I have a feeling that the order of these operations matters, so all I've done here may be incorrect. I have a form on the front page of my site that includes a checkbox that is required in order to enter the site. The form action goes to a page where this is checked, a $_SESSION variable is set, and the page is redirected. I am also not sure if I need the session_write_close(); command, or if it is in the right place. In the full length version, it could be moved into the set of commands following the IF. Here is the full length code that I would like to translate into shorthand: Code: [Select] <?php session_start(); if (isset($_POST['ConsentCheckbox']) { $_SESSION['Consented'] = 'true'; header('Location: http://www.mySite/welcome'); } else { header('Location: http://www.mySite/errors/NotConsented'); } session_write_close(); ?> The if/else conditions translate easily into these two lines of code, which could be one line if I didn't also need to set the session variable: Code: [Select] <?php session_start(); $_SESSION['Consented'] = isset($_POST['ConsentCheckbox']) ? 'true' : 'false'; header('Location: http://mySite.com/'.($_SESSION['Consented'] ? 'welcome' : 'error/NotConsented')); session_write_close(); ?> But, I really only need to set the $_SESSION variable if the $_POST['ConsentCheckbox'] is set. This makes the test on the following pages of my site much simpler (where I test to see if the $_SESSION variable is set and then either redirect to the consent form or load the desired page). SO, I'm wondering if it can be further condensed. I've come up with these possibilities, but am not totally sure. This has now become a theoretical exercise in coding for me. Here is what I think is possible, but I have a couple of outstanding questions, so I'd like some input, please. I first translated it into the following. I think this is correct, although I'm not sure if I need brackets around the multiple commands in the TRUE section. Code: [Select] <?php session_start(); isset($_POST['ConsentCheckbox']) ? $_SESSION['Consented']='true'; header('Location: http://www.mySite.com/welcome') : header('Location: http://www.mySite/errors/NotConsented'); session_write_close(); ?> Then, I wondered if I can even further condense it in the following way? Here is where the order of the commands is likely to break the code - and I'm not entirely sure that my use of double quotes will suffice instead of escaping out the end bracket of the header() command: Code: [Select] <?php session_start(); header('Location: http://www.mySite.com/'.(isset($_Post['ConsentCheckbox']) ? "welcome')"; $_SESSION['Consented'] = 'true' : "errors/NotConsented')"); session_write_close(); ?> Have I gone too far? Thanks I have been looking at this code most of the morning and do not have a clue what is wrong with the code. I am hoping its not a stupid mistake, can someone please help me out? thank you
<title>Inputing Travel Detials</title>
<header>
<h1 align="center"> Adding Travel Detials </h1>
<body>
<p> <center><img src="cyberwarfareimage1.png" alt="Squadron logo" style="width:200px;height:200px" style="middle"></center>
<table border="1">
<tr>
<td><a href="index.php"> Home Page </a></td>
<td><a href="administratorhomepage.html">Administrator Home Page </a></td>
<td><a href="viewhomepage.html">View Home Page </a></td>
<td><a href="Inputhomepage.html">Input Home Page </a></td>
<td><a href="traveldetials.html">Enter More Travel Detials </a></td>
</table>
</p>
<?php
include "connection.php";
$Applicant_ID = $_POST["Applicant_ID"];
$Method_Of_Travel = $_POST["Method_Of_Travel"];
$Cost = $_POST["Cost"];
$ETA = $_POST["ETA"];
$Main_Gate_Advised = $_POST["Main_Gate_Advised"];
$query = ("UPDATE `int_board_applicant` SET `Method_Of_Travel`=`$Method_Of_Travel', `Cost`=`$Cost', `ETA`='$ETA', `Main_Gate_Advised`='$Main_Gate_Advised' WHERE `Applicant_ID`='$Applicant_ID'");
$result = mysqli_query($dbhandle, $query)
or die(mysqli_error($dbhandle));
if($result){ echo "Success!"; }
else{ echo "Error."; }
// successfully insert data into database, displays message "Successful".
if($query){
echo "Successful";
}
else {
echo "Data not Submitted";
}
//closing the connection
mysqli_close($dbhandle)
?>
Ok this is puzzleing. I am geting "Could not delete data: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '1' at line 1". but its is deleting the entry that needs to be removed. The "1" is the entry. Just not sure what is causing the error. I do have another delete php but I have put that on the back burning for the time being.
<?php $con = mysqli_connect("localhost","user","password","part_inventory"); // Check connection if (mysqli_connect_errno()) { printf("Connect failed: %s\n", mysqli_connect_error()); exit(); } else { $result = mysqli_query($con, "SELECT * FROM amp20 "); $amp20ptid = $_POST['amp20ptid']; // escape variables for security $amp20ptid = mysqli_real_escape_string($con, $_POST['amp20ptid']); mysqli_query($con, "DELETE FROM amp20 WHERE amp20ptid = '$amp20ptid'"); if (!mysqli_query($con, $amp20ptid)); { die('Could not delete data: ' . mysqli_error($con)); } echo "Part has been deleted to the database!!!\n"; mysqli_close($con); } ?> |
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