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copied!<p>From: <a href="http://web.archive.org/web/20090221144611/http://faqts.com/knowledge_base/view.phtml/aid/1/fid/40" rel="noreferrer">http://web.archive.org/web/20090221144611/http://faqts.com/knowledge_base/view.phtml/aid/1/fid/40</a></p> <ol> <li><p>Speed. There is a difference between the two, but speed-wise it should be irrelevant which one you use. echo is marginally faster since it doesn't set a return value if you really want to get down to the nitty gritty. </p></li> <li><p>Expression. <code>print()</code> behaves like a function in that you can do: <code>$ret = print "Hello World"</code>; And <code>$ret</code> will be <code>1</code>. That means that print can be used as part of a more complex expression where echo cannot. An example from the PHP Manual:</p></li> </ol> <pre class="lang-php prettyprint-override"><code>$b ? print "true" : print "false"; </code></pre> <p>print is also part of the precedence table which it needs to be if it is to be used within a complex expression. It is just about at the bottom of the precedence list though. Only "," AND, OR and XOR are lower.</p> <ol start="3"> <li>Parameter(s). The grammar is: <code>echo expression [, expression[, expression] ... ]</code> But <code>echo ( expression, expression )</code> is not valid. This would be valid: <code>echo ("howdy"),("partner")</code>; the same as: <code>echo "howdy","partner"</code>; (Putting the brackets in that simple example serves no purpose since there is no operator precedence issue with a single term like that.)</li> </ol> <p>So, echo without parentheses can take multiple parameters, which get concatenated:</p> <pre><code> echo "and a ", 1, 2, 3; // comma-separated without parentheses echo ("and a 123"); // just one parameter with parentheses </code></pre> <p><code>print()</code> can only take one parameter:</p> <pre><code> print ("and a 123"); print "and a 123"; </code></pre>

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