I want to store an property->object name in a table and access in code.
What is the proper way to accomplish the following.
$patient = new stdClass();
$patient->patient_number = '12345';
$cls = 'patient';
$prp = 'patient_number';
echo 'test1 = ' . $patient->patient_number . '<br>';
//--- this prints 12345 as expected;
echo 'test2 = ' . $$cls->patient_number . '<br>';
//--- this print 12345 as expected;
echo 'test3 = ' . $$cls->${$prp} . '<br>';
//--- this generates undefined variable patient_number;
Use this:
echo 'test3 = ' . ${$cls}->{$prp} . '<br>';
Related
does not work with a nested element
the elements of the first level are output, and the nested array with data is not read, as it is possible to get values - id, title and location?
<?php
function removeBomUtf8($s){
if(substr($s,0,3)==chr(hexdec('EF')).chr(hexdec('BB')).chr(hexdec('BF'))){
return substr($s,3);
}else{
return $s;
}
}
$url = "https://denden000qwerty.000webhostapp.com/opportunities.json";
$content = file_get_contents($url);
$clean_content = removeBomUtf8($content);
$decoded = json_decode($clean_content);
while ($el_name = current($decoded)) {
// echo 'total = ' . $el_name->total_items . 'current = ' . $el_name->current_page . 'total = ' . $el_name->total_pages . '<br>' ;
echo ' id = ' . $el_name->data[0]->id . ' title = ' . $el_name->data.title . ' location = ' . $el_name->data.location . '<br>' ;
next($decoded);
}
?>
$el_name->data[0]->id is correct
$el_name->data.title is not
you see the difference?
and $decoded is the root (no need to iterate over it) - you want to iterate over the data children
<?php
foreach($decoded->data as $data)
{
$id = (string)$data->id;
$title = (string)$data->title;
$location = (string)$data->location;
echo sprintf('id = %s, title = %s, location = %s<br />', $id, $title, $location);
}
I tried to access an object property which has array form using string variable but not able do so when the string contains index selection. Take a look at this example.. what i was tring to do is to use $access3 like string
$dummy = new stdClass();
$dummy->testNormal = 'itemNormal';
$dummy->testArray = array('item1', 'item2');
$access1 = 'testNormal';
$access2 = 'testArray';
$access3 = 'testArray[0]';
echo 'try access1: ' . $dummy->{$access1} . '<br />';
echo 'try access2: ' . $dummy->{$access2}[0] . '<br />';
echo 'try access3: ' . $dummy->{$access3} . '<br />';
echo 'try direct: ' . $dummy->testArray[0] . '<br />';
The above code will return
try access1: itemNormal
try access2: item1
--- ERROR MESSAGE --
try access3: <-- does not contain anything because of error, my expectation is it will be "item1"
try direct: item1
Is this impossible with php?
$access_handler = explode('[', $access3);
// get array name
$array_name = $access_handler[0];
// get array index
$array_index = substr($access_handler[1], 0, -1);
// call the property
echo $dummy->$array_name[$array_index];
you might create function for this. Otherwise you would have to use eval to evaluate your string, but that is not recommended. Also there are many ways to separate index from array name and then run it as in this example
I am very beginner in programmer and I am learning.
I am sorry if my question is too bad.
I want to create variable in php from api content, for example:
This contents is from this URL: http://example.com/api
{"name":"John","age":"20","genre":"male","language":[{"id":"22","name":"english"},{"id":"23","name":"french"}]}
<?php
$content = file_get_contents("http://example.com/api");
$content = str_replace('"', "", $content);
$content = str_replace(":", "=", $content);
$content = str_replace(",", "&", $content);
parse_str($content);
echo $name; //John
echo $age; //20
echo $genre; //male
echo $language //[{id <======== here is my problem
?>
My problem is when I am getting an array like "language", how to fix it?
Thanks for help.
U can use the http://www.php.net/json_decode in two ways :
This is object oriented :
$str = '{"name":"John","age":"20","genre":"male","language":[{"id":"22","name":"english"},{"id":"23","name":"french"}]}';
$json = json_decode($str);
echo 'name: ' . $json->{'name'} .'<br>';
echo 'age: ' . $json->{'age'} .'<br>';
echo 'genre: ' . $json->{'genre'} . '<br>';
foreach($json->{'language'} as $data){
echo 'id: ' . $data->{'id'} . '<br>';
echo 'name: ' . $data->{'name'} . '<br>';
}
As an associative array :
$json = json_decode($str, true);
echo 'name: ' . $json['name'] .'<br>';
echo 'age: ' . $json['age'] .'<br>';
echo 'genre: ' . $json['genre'] . '<br>';
foreach($json['language'] as $data){
echo 'id: ' . $data['id'] . '<br>';
echo 'name: ' . $data['name'] . '<br>';
}
json_decode() will help you to convert the string data to something more accessible:
<?php
// Instead of your fetched data we use static example data in this script
//$content = file_get_contents("http://example.com/api");
$content = '{"name":"John","age":"20","genre":"male","language":[{"id":"22","name":"english"},{"id":"23","name":"french"}]}';
// Convert json data to object
$data = json_decode($content);
// access object properties by using "->" operator
echo $data->name;
echo $data->age;
echo $data->genre;
// language is an array of objects, so let's look at each language object...
foreach($data->language as $lang) {
// ... and extract data using "->" again
echo $lang->id;
echo $lang->name;
}
A live example of this code can be found at http://sandbox.onlinephpfunctions.com/code/6df679c3faa8fff43308a34fb80b2eeb0ccfe47c
As pointed out by #fusionK, the response from the api request is a json string so convert to an object ( or array if preferred ) using json_decode ( json_decode( $data,true ) for an array )
Once it is decoded it is straightforward to access the properties of the object.
<?php
/* capture and decode response from api - creates an object */
$content = json_decode( file_get_contents("http://example.com/api") );
/* using object notation to access properties */
echo $content->name.' '.$content->age.' '.$content->genre;
/* for the language which is an array of objects */
$lang=$content->language;
foreach( $lang as $language ){
$obj=(object)$language;
echo $obj->id.' '.$obj->name;
}
?>
I'm trying to use Simple_Html_Dom parser to parse a web page for NBA statistics. I'm going to have a lot of different urls, but parsing the same data, so I figured I would create a function. Outside of the function, this parser works great, however as soon as I place the parsing inside the function, I receive a connection error. Just wondering, if anyone knows why I can't run the file_get_html inside the function. Here is the code below. Please help!
include('simple_html_dom.php');
$nbaPlayers = 'playerstats/15/1/eff/1-2';
function nbaStats($url){
$html = 'http://www.hoopsstats.com/basketball/fantasy/nba/';
$getHtml = $html . $url;
$a = file_get_html("$getHtml");
foreach($a->find('.statscontent tbody tr') as $tr){
$nbaStatLine = $tr->find('td');
$nbaName = $nbaStatLine[1]->plaintext;
$nbaGamesPlayed = $nbaStatLine[2]->plaintext;
$nbaMinuesPlayed = $nbaStatLine[3]->plaintext;
$nbaTotalPoints = $nbaStatLine[4]->plaintext;
$nbaRebounds = $nbaStatLine[5]->plaintext;
$nbaAssists = $nbaStatLine[6]->plaintext;
$nbaSteals = $nbaStatLine[7]->plaintext;
$nbaBlocks = $nbaStatLine[8]->plaintext;
$nbaTurnovers = $nbaStatLine[9]->plaintext;
$nbaoRebounds = $nbaStatLine[11];
$nbadRebounds = $nbaStatLine[12];
$nbaFieldGoals = $nbaStatLine[13];
$nbaFieldGoals = explode("-", $nbaFieldGoals);
$nbaFieldGoalsMade = $nbaFieldGoals[0];
$nbaFieldGoalsAttempted = $nbaFieldGoals[1];
// Player Stat Line
$playerStats = $nbaName . ': gp - ' . $nbaGamesPlayed . ' mp - ' . $nbaMinutesPlayed . ' pts - ' . $nbaTotalPoints . ' rb - ' . $nbaRebounds . ' as - ' . $nbaAssists . ' s - ' . $nbaSteals . ' bl - ' . $nbaBlocks . ' to - ' . $nbaTurnovers;
echo $playerStats . '<br /><br />';
}
}
nbaStats($nbaPlayers);
When passing a variable to a function you don't need to wrap the variable in quotations. Quotations are used when passing text directly to a function or assigning text to a variable.
Change this:
$a = file_get_html("$getHtml");
To this:
$a = file_get_html($getHtml);
I have the following php code:
$skizzar_masonry_item_width = $masonry_item_width;
$skizzar_masonry_item_padding = $masonry_item_padding;
$skizzar_double_width_size = $masonry_item_width*2 +$masonry_item_padding;
$output .= '<style>.skizzar_masonry_entry.skizzar_ma_double, .skizzar_masonry_entry.skizzar_ma_double img {width:'.$skizzar_double_width_size.'}</style>';
return $output;
For some reason though, the value of $skizzar_double_width_size is not being added into the $output - is there a way to echo a value in an output variable?
As #Rizier123 mentioned, ensure you initialise any string variables before trying to append to them.
$var = '';
$var .= 'I appended';
$var .= ' a string!';
I would also like to strongly discourage you from using inline styles as well as generating them with inline PHP. Things get very messy very quickly.
In a situation like this you need to check that all the variables you are using in the calculation are valid before you panic.
So try
echo 'before I use these values they contain<br>';
echo '$masonry_item_width = ' . $masonry_item_width . '<br>';
echo '$masonry_item_padding = ' . $masonry_item_padding . '<br>';
$skizzar_masonry_item_width = $masonry_item_width;
$skizzar_masonry_item_padding = $masonry_item_padding;
$skizzar_double_width_size = $masonry_item_width*2 +$masonry_item_padding;
echo 'after moving the fields to an unnecessary intemediary field<br>';
echo '$skizzar_masonry_item_width = ' . $skizzar_masonry_item_width . '<br>';
echo '$skizzar_masonry_item_padding = ' . $skizzar_masonry_item_padding . '<br>';
echo '$skizzar_double_width_size = ' . $skizzar_double_width_size . '<br>';
$output .= '<style>.skizzar_masonry_entry.skizzar_ma_double, .skizzar_masonry_entry.skizzar_ma_double img {width:'.$skizzar_double_width_size.'}</style>';
echo $output;
This should identify which fields are causing you problems.
Also while testing always run with display_errors = On It saves so much time in the long run.