I am having trouble echoing this line. Is anyone willing to help?
echo '<li>'.$row->subject.'</li>';
As your string is enclosed in single-quotes, you have to close the quotes, concatenate the variables, and re-open the quotes :
echo '<li><a href="http://stackoverflow.com/thread-'
. $row->tid
. '-1-1.html">'
. $row->subject
. '</a></li>';
(split over several lines to improve readability)
Else, you could use a double-quoted string, to have variables interpolation -- escaping the double-quotes that are inside the string :
echo "<li>{$row->subject}</li>";
Your quotes are mismatched.
....'-1-1.html">'....
<?php
echo <<<_HTML_
<li>
{$row->subject}
</li>
_HTML_;
?>
You are echoing one single quote too much in the middle of this part: '-1-1.html'">'. This single quote is currently closing the string and will result in a parse error.
If your editor is supporting syntax highlighting, you will be able to notice a difference in colour after this quote.
To solve this problem, change this your code to:
echo '<li>'.$row->subject.'</li>';
?>
<li>
<a href="http://stackoverflow.com/thread-<?=$row->tid?>-1-1.html">
<?=$row->subject?>
</a>
</li>
like this:
echo '<li>'.$row->subject.'</li>';
Related
This question already has answers here:
php - insert a variable in an echo string
(10 answers)
Closed 3 years ago.
All I want to do is echo out a PHP variable inside a <li> tag. Refer to the code below. What's the proper format? Mine is not working.
$row['cat_title'];
echo "<li> {$cat_title} </li>";
If you need to output a value of a particular array key (e.g. $row['cat_title']) in HTML, you have quite a few options.
You can use the concatenation operator (.):
echo '<li>' . $row['cat_title'] . '</li>';
You can use variable interpolation with simple string parsing (note that in this syntax, quotes around the array key must be omitted):
echo "<li>$row[cat_title]</li>";
You can use variable interpolation with complex string parsing (using {}) which is actually not necessary here, but useful for more interpolating more complex expressions. With this syntax, quotes around the array key should be included.:
echo "<li>{$row['cat_title']}</li>";
You can output plain HTML and use the echo shortcut syntax <?= to output the value (only do this if you are already outputting HTML, not if you are currently in a <?php tag; that would be a syntax error.):
<li><?= $row['cat_title'] ?></li>
You can use printf (thanks to Elias Van Ootegem's comment for reminding me of this; I should have included it to begin with). sprintf can be used if you want to save the result to a variable instead; printf will output it immediately:
printf('<li>%s</li>', $row['cat_title']);
The first argument of printf is a format string, where %s is a string conversion specification that will take the value of $row['cat_title'] when printf is executed.
There are other ways, but these are the most common.
You need to reference the right variable. You're on the right track, though.
echo "<li> {$row['cat_title']} </li>";
echo '<li>'.$var.'</li>';
OR
echo "<li>$var</li>";
OR
<li><?=$var?></li>
If the file is mostly PHP in the file then:
<?php echo "<li>" . $row['cat_title'] . "</li>"; ?>
Or conversely if it's mostly HTML in the file then:
<li><?php echo $row['cat_title']; ?></li>
It sounds to me that it's most likely the second option you are looking for.
Another alternative:
<li><?php echo $row['cat_title']; ?></li>
Either of these methods will work...
// Use single quotes and periods like this...
echo '<li>'. $row['cat_title'] .'</li>';
OR
// Use double quotes like this...
echo "<li> $row['cat_title'] </li>";
The following line of code is supposed to echo the current season and a data in a php echo:
<?php echo "<h5>" $_SESSION['username'] '<span class="chat_date">'Dec 25"</span></h5>" ?>
Is the session call true? And how can I fix this code?
if you want echo a string you should use concatenation operator ('.')
<?php echo '<h5>' .$_SESSION['username']. '<span class="chat_date">Dec 25</span></h5>' ?>
or use double-quotes (") to passing data
$usename=$_SESSION['username'];
<?php echo '<h5>"$usename"<span class="chat_date">Dec 25</span></h5>' ?>
There is no need to concatenate a string before echoing it in PHP.
The parameters can be passed individually to echo as multiple arguments for a slight performance (speed) increase. In other words, you can use , instead of ..
For example:
<?php echo '<h5>' , $_SESSION['username'] , '<span class="chat_date">Dec 25</span</h5>'; ?>
I would recommend reading the Official Documentation.
<?php
echo "<h5> $_SESSION[username] <span class=\"chat_date\">Dec 25</span></h5>";
?>
Variables are evaluated inside double quoted strings.
To echo double quotes inside double quotes, you add a backslash before the double quote so PHP knows it is not the end of the quoted segment.
For arrays, do not quote the key inside a string.
This question already has answers here:
php - insert a variable in an echo string
(10 answers)
Closed 3 years ago.
All I want to do is echo out a PHP variable inside a <li> tag. Refer to the code below. What's the proper format? Mine is not working.
$row['cat_title'];
echo "<li> {$cat_title} </li>";
If you need to output a value of a particular array key (e.g. $row['cat_title']) in HTML, you have quite a few options.
You can use the concatenation operator (.):
echo '<li>' . $row['cat_title'] . '</li>';
You can use variable interpolation with simple string parsing (note that in this syntax, quotes around the array key must be omitted):
echo "<li>$row[cat_title]</li>";
You can use variable interpolation with complex string parsing (using {}) which is actually not necessary here, but useful for more interpolating more complex expressions. With this syntax, quotes around the array key should be included.:
echo "<li>{$row['cat_title']}</li>";
You can output plain HTML and use the echo shortcut syntax <?= to output the value (only do this if you are already outputting HTML, not if you are currently in a <?php tag; that would be a syntax error.):
<li><?= $row['cat_title'] ?></li>
You can use printf (thanks to Elias Van Ootegem's comment for reminding me of this; I should have included it to begin with). sprintf can be used if you want to save the result to a variable instead; printf will output it immediately:
printf('<li>%s</li>', $row['cat_title']);
The first argument of printf is a format string, where %s is a string conversion specification that will take the value of $row['cat_title'] when printf is executed.
There are other ways, but these are the most common.
You need to reference the right variable. You're on the right track, though.
echo "<li> {$row['cat_title']} </li>";
echo '<li>'.$var.'</li>';
OR
echo "<li>$var</li>";
OR
<li><?=$var?></li>
If the file is mostly PHP in the file then:
<?php echo "<li>" . $row['cat_title'] . "</li>"; ?>
Or conversely if it's mostly HTML in the file then:
<li><?php echo $row['cat_title']; ?></li>
It sounds to me that it's most likely the second option you are looking for.
Another alternative:
<li><?php echo $row['cat_title']; ?></li>
Either of these methods will work...
// Use single quotes and periods like this...
echo '<li>'. $row['cat_title'] .'</li>';
OR
// Use double quotes like this...
echo "<li> $row['cat_title'] </li>";
This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
How to get useful error messages in PHP?
Ive started on part of my new year resolution and decided to learn php, as part of it im trying to parse in an xml feed, and echo out the name of the events wrapped in <a> tags linking them back to the events page on the xml feed's site.
I think ive got it all in but i cant seem to see why this isnt working im just getting a blank page, if some one could point me in the right direction it would be much appreciated, cheers
<?php
// F1 W/H xml feed
$xml = simplexml_load_file('http://whdn.williamhill.com/pricefeed/openbet_cdn?action=template&template=getHierarchyByMarketType&classId=5&marketSort=HH&filterBIR=N');
foreach ($xml->response->williamhill->class->type as $type) {
$type_attrib = $type->attributes();
echo "<h2>".$type_attrib['name']."</h2>"; //Title - in this case f1 championship
} ?>
<ul>
<?php
foreach($type->market as $event) {
echo "<li>";
echo "<a href="$event_attributes['url']">";
echo $event_attributes['name'];
echo "</a>";
echo "</li>";
}
?>
</ul>
echo "<a href="$event_attributes['url']">";
try changing that line to
echo "<a href=\"".$event_attributes['url']."\">";
The Php parser is pretty funny about this. Usually you pick one and just stick to it, or use both single quotes and double quotes as you please. Just remember that strings with double quotes are parsed for variables.
$hello = "Hello";
echo "$hello master";
is the same as
$hello ="Hello";
echo $hello.' master';
When you are testing your PHP scripts, you'll find it useful to switch on errors - then PHP will actually tell you why it isn't showing you anything:
error_reporting(E_ALL);
Normally you will have missed a ; or mis-typed a variable name.
in your case the error is here:
echo "<a href="$event_attributes['url']">";
You have accidentally ended the string with a double quote, so PHP thinks the string ends here:
echo "<a href="
This is where using single-quotes can be very handy because your double quotes won't then close the string.
echo '<a href="' . $event_attributes['url'] . '">';
The main difference between single and double quotes in PHP is that double quotes has special clever parsing rules and single quotes doesn't. For example:
$myVar = "BLAH";
echo "Example $myVar"; // Example BLAH
echo 'Example $myVar'; // Example $myVar
In your unordered list, you should use a dot to concatenate your string, and escape your double quotes like this:
echo "<a href=\"".$event_attributes['url']."\">";
Instead of
echo "<a href="$event_attributes['url']">";
Your example throws and error because you haven't used proper string concatenation. However, even with correct concat, it would render as <a href=http://someurl>, and you'd need to add the double quotes according to html standard. Hence you have to double quote.
if you want to not be troubled by having to switch between using a ' or a " then i suggest using the php alternative syntax php alternative syntax
with the given code it would look like
<?php
// F1 W/H xml feed
$xml = simplexml_load_file('http://whdn.williamhill.com/pricefeed/openbet_cdn?action=template&template=getHierarchyByMarketType&classId=5&marketSort=HH&filterBIR=N');
foreach ($xml->response->williamhill->class->type as $type) {
$type_attrib = $type->attributes();
echo "<h2>".$type_attrib['name']."</h2>"; //Title - in this case f1 championship
} ?>
<ul>
<?php foreach($type->market as $event):?>
<li>
<a href="<?php echo $event_attributes['url']; ?>">
<?php echo $event_attributes['name']; ?>
</a>
</li>
<? endforeach;?>
</ul>
one advantage this would bring is that it would produce cleaner code since you can clearly distiguish your php code from your html which is the presentational part at the price writing all those other <?php ?> and as what others would claim a performance degradation. the choice is yours
Change
echo "<a href="$event_attributes['url']">";
for
echo "<a href=".$event_attributes['url'].">";
You are missing the periods in your second echo, where you have your $event_attributes['url']
<?php
foreach($type->market as $event) {
echo "<li>";
echo "<a href=".$event_attributes['url'].">";
echo $event_attributes['name'];
echo "</a>";
echo "</li>";
}
?>
I would recommend you to enable your error log, it would allow you to know the line with problems in any of your scripts.
It's probably stupid question, but I can not find an answer. How can I style echo output with css? I have this code:
echo "<div id="errormsg"> Error </div>";
Now it displays syntax error, I think because of those quotes around errormsg. I've tried single quotes, but with no effect. Thank you
When outputting HTML, it's easier to use single quotes so you can use proper double quotes inside like so:
echo '<div id="errormsg"> Error </div>';
That will get rid of your parse error... To edit the style you will need to use CSS with the selector of #errormsg like so:
#errormsg {
color: red;
}
try
echo "<div id=\"errormsg\"> Error </div>";
First you need to either use single-quotes to surround the attribute value:
echo "<div id='errormsg'> Error </div>";
Or you could reverse that, to give:
echo '<div id="errormsg"> Error </div>';
Or you should escape the quotes:
echo "<div id=\"errormsg\"> Error </div>";
And then style the resulting element with the CSS:
#errormsg {
/* css */
}
The syntax problem you were encountering is a result of terminating the string and then having a disparate element between the first and second strings, with which PHP has no idea what to do.
To put double quotes inside of a double-quoted string, you need to "escape" them by putting blackslashes before them:
echo "<div id=\"errormsg\"> Error </div>";
In this case, another choice is to use single quotes for one or the other.
echo "<div id='errormsg'> Error </div>";
echo '<div id="errormsg"> Error </div>';
PHP's documentation has a section explaining the different string syntaxes, which should explain everything you could want to know about this subject.
Use single quotes around errormsg and what you have should work just fine. Alternatively, but less tidy, you can escape the double quotes with a backslash.
echo "<div id='errormsg'> Error </div>";
You are getting a syntax error because you are including unescaped double quotes inside a string that is delimited by double quotes.
Either escape them
echo "<div id=\"errormsg\"> Error </div>";
or use single quotes
echo '<div id="errormsg"> Error </div>';
The browser doesn't care if you generated markup using echo or something else. It just sees the HTML you send to it.
For the above markup, you can style it using an id selector:
#errormsg { /* … */ }
The usual rules for the cascade (including specificity) will apply.
If you don't want to care about single quotes or double quotes then the better way to achieve your answer is to use heredoc syntax .
Your solution :
<?php
$heredoc = <<< EOT
<div id="errormsg">Error solved</div>
EOT;
echo "$heredoc";
?>
css :
#errormsg{color: green;}
WARNING :
Do not add whiteSpace after <<< EOT
Do not add whiteSpace before EOT;
Do not add whiteSpace between EOT and ;
Do not add whiteSpace after EOT;
EOT; must be in new line.