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tutorial: update browser in the tutorial (#2478)

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Update the example to a browser that people can actually download and install from official websites on macOS, Linux, and Windows today.
This commit is contained in:
Timo Tijhof
2023-07-28 03:25:34 +01:00
committed by GitHub
parent 597c856ee7
commit 528bcc7b2e
1 changed files with 13 additions and 13 deletions
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26
chapters/tutorial.xml
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@@ -232,14 +232,14 @@ echo $_SERVER['HTTP_USER_AGENT'];
A sample output of this script may be:
</para>
<screen role="html">
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)
Mozilla/5.0 (Linux) Firefox/112.0
</screen>
</example>
</para>
<para>
There are many <link linkend="language.types">types</link> of
variables available in PHP. In the above example we printed
an <link linkend="language.types.array">Array</link> element.
variables available in PHP. In the above example we printed an element
from an <link linkend="language.types.array">Array</link> variable.
Arrays can be very useful.
</para>
<para>
@@ -253,7 +253,7 @@ Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)
<para>
You can put multiple PHP statements inside a PHP tag and create
little blocks of code that do more than just a single echo.
For example, if you want to check for Internet Explorer you
For example, if you want to check for Firefox you
can do this:
</para>
<para>
@@ -263,8 +263,8 @@ Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)
<programlisting role="php">
<![CDATA[
<?php
if (strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== FALSE) {
echo 'You are using Internet Explorer.<br />';
if (strpos($_SERVER['HTTP_USER_AGENT'], 'Firefox') !== false) {
echo 'You are using Firefox.<br />';
}
?>
]]>
@@ -274,7 +274,7 @@ if (strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== FALSE) {
</para>
<screen role="html">
<![CDATA[
You are using Internet Explorer.<br />
You are using Firefox.<br />
]]>
</screen>
</example>
@@ -292,7 +292,7 @@ You are using Internet Explorer.<br />
The second concept we introduced was the <function>strpos</function>
function call. <function>strpos</function> is a function built into
PHP which searches a string for another string. In this case we are
looking for <literal>'MSIE'</literal> (so-called needle) inside
looking for <literal>'Firefox'</literal> (so-called needle) inside
<varname>$_SERVER['HTTP_USER_AGENT']</varname> (so-called haystack). If
the needle is found inside the haystack, the function returns the position
of the needle relative to the start of the haystack. Otherwise, it
@@ -319,15 +319,15 @@ You are using Internet Explorer.<br />
<programlisting role="php">
<![CDATA[
<?php
if (strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== FALSE) {
if (strpos($_SERVER['HTTP_USER_AGENT'], 'Firefox') !== false) {
?>
<h3>strpos() must have returned non-false</h3>
<p>You are using Internet Explorer</p>
<p>You are using Firefox</p>
<?php
} else {
?>
<h3>strpos() must have returned false</h3>
<p>You are not using Internet Explorer</p>
<p>You are not using Firefox</p>
<?php
}
?>
@@ -339,7 +339,7 @@ if (strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== FALSE) {
<screen role="html">
<![CDATA[
<h3>strpos() must have returned non-false</h3>
<p>You are using Internet Explorer</p>
<p>You are using Firefox</p>
]]>
</screen>
</example>
@@ -350,7 +350,7 @@ if (strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== FALSE) {
to note here is that the logical flow of the script remains intact. Only
one of the HTML blocks will end up getting sent to the viewer depending on
the result of <function>strpos</function>. In other words, it depends on
whether the string <literal>MSIE</literal> was found or not.
whether the string <literal>Firefox</literal> was found or not.
</para>
</section>