Source of: /manual/fa/function.is-numeric.php
<?php
include_once $_SERVER['DOCUMENT_ROOT'] . '/include/shared-manual.inc';
$TOC = array();
$PARENTS = array();
include_once dirname(__FILE__) ."/toc/ref.var.inc";
$setup = array (
'home' =>
array (
0 => 'index.php',
1 => 'PHP Manual',
),
'head' =>
array (
0 => 'UTF-8',
1 => 'fa',
),
'this' =>
array (
0 => 'function.is-numeric.php',
1 => 'is_numeric',
),
'up' =>
array (
0 => 'ref.var.php',
1 => 'Variable handling Functions',
),
'prev' =>
array (
0 => 'function.is-null.php',
1 => 'is_null',
),
'next' =>
array (
0 => 'function.is-object.php',
1 => 'is_object',
),
);
$setup["toc"] = $TOC;
$setup["parents"] = $PARENTS;
manual_setup($setup);
manual_header();
?>
<div id="function.is-numeric" class="refentry">
<div class="refnamediv">
<h1 class="refname">is_numeric</h1>
<p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">is_numeric</span> — <span class="dc-title">
Finds whether a variable is a number or a numeric string
</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.is-numeric-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">bool</span> <span class="methodname"><b>is_numeric</b></span>
( <span class="methodparam"><span class="type"><a href="language.pseudo-types.php#language.types.mixed" class="type mixed">mixed</a></span> <tt class="parameter">$var</tt></span>
)</div>
<p class="para rdfs-comment">
Finds whether the given variable is numeric. Numeric strings consist of
optional sign, any number of digits, optional decimal part and optional
exponential part. Thus <i>+0123.45e6</i> is a valid numeric
value. Hexadecimal notation (<i>0xFF</i>) is allowed too but
only without sign, decimal and exponential part.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.is-numeric-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><i><tt class="parameter">var</tt></i></span>
<dd>
<p class="para">
The variable being evaluated.
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.is-numeric-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns <b><tt>TRUE</tt></b> if <i><tt class="parameter">var</tt></i> is a number or a numeric
string, <b><tt>FALSE</tt></b> otherwise.
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.is-numeric-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-4323">
<p><b>Example #1 <span class="function"><b>is_numeric()</b></span> examples</b></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$tests </span><span style="color: #007700">= array(<br /> </span><span style="color: #DD0000">"42"</span><span style="color: #007700">, <br /> </span><span style="color: #0000BB">1337</span><span style="color: #007700">, <br /> </span><span style="color: #DD0000">"1e4"</span><span style="color: #007700">, <br /> </span><span style="color: #DD0000">"not numeric"</span><span style="color: #007700">, <br /> Array(), <br /> </span><span style="color: #0000BB">9.1<br /> </span><span style="color: #007700">);<br /><br />foreach (</span><span style="color: #0000BB">$tests </span><span style="color: #007700">as </span><span style="color: #0000BB">$element</span><span style="color: #007700">) {<br /> if (</span><span style="color: #0000BB">is_numeric</span><span style="color: #007700">(</span><span style="color: #0000BB">$element</span><span style="color: #007700">)) {<br /> echo </span><span style="color: #DD0000">"'</span><span style="color: #007700">{</span><span style="color: #0000BB">$element</span><span style="color: #007700">}</span><span style="color: #DD0000">' is numeric"</span><span style="color: #007700">, </span><span style="color: #0000BB">PHP_EOL</span><span style="color: #007700">;<br /> } else {<br /> echo </span><span style="color: #DD0000">"'</span><span style="color: #007700">{</span><span style="color: #0000BB">$element</span><span style="color: #007700">}</span><span style="color: #DD0000">' is NOT numeric"</span><span style="color: #007700">, </span><span style="color: #0000BB">PHP_EOL</span><span style="color: #007700">;<br /> }<br />}<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
<div class="example-contents"><p>The above example will output:</p></div>
<div class="example-contents screen">
<div class="cdata"><pre>
'42' is numeric
'1337' is numeric
'1e4' is numeric
'not numeric' is NOT numeric
'Array' is NOT numeric
'9.1' is numeric
</pre></div>
</div>
</div>
</p>
</div>
<div class="refsect1 seealso" id="refsect1-function.is-numeric-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"><span class="function"><a href="function.ctype-digit.php" class="function" rel="rdfs-seeAlso">ctype_digit()</a> - Check for numeric character(s)</span></li>
<li class="member"><span class="function"><a href="function.is-bool.php" class="function" rel="rdfs-seeAlso">is_bool()</a> - Finds out whether a variable is a boolean</span></li>
<li class="member"><span class="function"><a href="function.is-null.php" class="function" rel="rdfs-seeAlso">is_null()</a> - Finds whether a variable is NULL</span></li>
<li class="member"><span class="function"><a href="function.is-float.php" class="function" rel="rdfs-seeAlso">is_float()</a> - Finds whether the type of a variable is float</span></li>
<li class="member"><span class="function"><a href="function.is-int.php" class="function" rel="rdfs-seeAlso">is_int()</a> - Find whether the type of a variable is integer</span></li>
<li class="member"><span class="function"><a href="function.is-string.php" class="function" rel="rdfs-seeAlso">is_string()</a> - Find whether the type of a variable is string</span></li>
<li class="member"><span class="function"><a href="function.is-object.php" class="function" rel="rdfs-seeAlso">is_object()</a> - Finds whether a variable is an object</span></li>
<li class="member"><span class="function"><a href="function.is-array.php" class="function" rel="rdfs-seeAlso">is_array()</a> - Finds whether a variable is an array</span></li>
</ul>
</p>
</div>
</div><?php manual_footer(); ?>
