PHP Tags & Comments - PHP tags and comments

PHP tags

1. Standard Tags

Standard form

<code><span><?php</span><span>echo</span><span>'ABC'</span>; <span>?></span></code>

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2. Short Tags

You need to set short_open_tag = On in php.ini

<code><span><?</span><span>echo</span><span>'ABC'</span>; <span>?></span></code>

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3. Echo Short Tags

Short form for short tag output
PHP5.4 and above versions no longer need to set short_open_tag when using this form

<code><span><?</span>=<span>'ABC'</span>; <span>?></span><span><?</span>=<span>'A'</span>,<span>'B'</span>,<span>'C'</span>; <span>?></span></code>

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4. ASP-Style Tags

You need to set asp_tags = On in php.ini
PHP7 is obsolete and no longer used

<code><% <span>echo</span><span>'ABC'</span>; %></code>

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5. Echo ASP-Style Tags

Need to set asp_tags = On in php.ini
PHP7 has been deprecated and is no longer used

<code><%=<span>'ABC'</span>; %></code>

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6. Script Tags

PHP7 has been deprecated and is no longer used

<code><script language=<span>"php"</span>><span>echo</span><span>'ABC'</span>;</script></code>

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PHP comments

1. One-line C++ style

<code><span>// This is a one-line c++ style comment</span></code>

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2. One-line shell style

<code><span># This is a one-line shell-style comment</span></code>

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3. Multi-line comments

<code><span>/* This is a multi line comment
   yet another line
   of comment */</span></code>

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