PHP: lcfirst - Manual (original) (raw)
(PHP 5 >= 5.3.0, PHP 7, PHP 8)
lcfirst — Make a string's first character lowercase
Description
Parameters
string
The input string.
Return Values
Returns the resulting string.
Changelog
| Version | Description |
|---|---|
| 8.2.0 | Case conversion no longer depends on the locale set withsetlocale(). Only ASCII characters will be converted. |
Examples
Example #1 lcfirst() example
<?php $foo = 'HelloWorld'; echo lcfirst($foo), PHP_EOL; // helloWorld$bar = 'HELLO WORLD!'; echo lcfirst($bar), PHP_EOL; // hELLO WORLD! echo lcfirst(strtoupper($bar)), PHP_EOL; // hELLO WORLD! ?>
See Also
- ucfirst() - Make a string's first character uppercase
- strtolower() - Make a string lowercase
- strtoupper() - Make a string uppercase
- ucwords() - Uppercase the first character of each word in a string
Found A Problem?
phpnet at katylavallee dot com ¶
16 years ago
Easiest work-around I've found for <5.3:
<?php
$string = "CamelCase" <span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>s</mi><mi>t</mi><mi>r</mi><mi>i</mi><mi>n</mi><mi>g</mi><mn>0</mn><mo>=</mo><mi>s</mi><mi>t</mi><mi>r</mi><mi>t</mi><mi>o</mi><mi>l</mi><mi>o</mi><mi>w</mi><mi>e</mi><mi>r</mi><mo stretchy="false">(</mo></mrow><annotation encoding="application/x-tex">string{0} = strtolower(</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.854em;vertical-align:-0.1944em;"></span><span class="mord mathnormal">s</span><span class="mord mathnormal">t</span><span class="mord mathnormal" style="margin-right:0.02778em;">r</span><span class="mord mathnormal">in</span><span class="mord mathnormal" style="margin-right:0.03588em;">g</span><span class="mord"><span class="mord">0</span></span><span class="mspace" style="margin-right:0.2778em;"></span><span class="mrel">=</span><span class="mspace" style="margin-right:0.2778em;"></span></span><span class="base"><span class="strut" style="height:1em;vertical-align:-0.25em;"></span><span class="mord mathnormal">s</span><span class="mord mathnormal">t</span><span class="mord mathnormal" style="margin-right:0.02778em;">r</span><span class="mord mathnormal">t</span><span class="mord mathnormal">o</span><span class="mord mathnormal" style="margin-right:0.01968em;">l</span><span class="mord mathnormal">o</span><span class="mord mathnormal" style="margin-right:0.02691em;">w</span><span class="mord mathnormal" style="margin-right:0.02778em;">er</span><span class="mopen">(</span></span></span></span>string{0})
echo $string; // outputs camelCase
?>
17 years ago
In some cases maybe more useful?
<span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>l</mi><mi>o</mi><mi>w</mi><mi>e</mi><mi>r</mi><mo>=</mo><mi>s</mi><mi>t</mi><mi>r</mi><mi>t</mi><mi>o</mi><mi>l</mi><mi>o</mi><mi>w</mi><mi>e</mi><mi>r</mi><mo stretchy="false">(</mo><mi>s</mi><mi>u</mi><mi>b</mi><mi>s</mi><mi>t</mi><mi>r</mi><mo stretchy="false">(</mo></mrow><annotation encoding="application/x-tex">lower = strtolower( substr(</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.6944em;"></span><span class="mord mathnormal" style="margin-right:0.01968em;">l</span><span class="mord mathnormal">o</span><span class="mord mathnormal" style="margin-right:0.02691em;">w</span><span class="mord mathnormal" style="margin-right:0.02778em;">er</span><span class="mspace" style="margin-right:0.2778em;"></span><span class="mrel">=</span><span class="mspace" style="margin-right:0.2778em;"></span></span><span class="base"><span class="strut" style="height:1em;vertical-align:-0.25em;"></span><span class="mord mathnormal">s</span><span class="mord mathnormal">t</span><span class="mord mathnormal" style="margin-right:0.02778em;">r</span><span class="mord mathnormal">t</span><span class="mord mathnormal">o</span><span class="mord mathnormal" style="margin-right:0.01968em;">l</span><span class="mord mathnormal">o</span><span class="mord mathnormal" style="margin-right:0.02691em;">w</span><span class="mord mathnormal" style="margin-right:0.02778em;">er</span><span class="mopen">(</span><span class="mord mathnormal">s</span><span class="mord mathnormal">u</span><span class="mord mathnormal">b</span><span class="mord mathnormal">s</span><span class="mord mathnormal">t</span><span class="mord mathnormal" style="margin-right:0.02778em;">r</span><span class="mopen">(</span></span></span></span>upper,0,1) ) . substr($upper,1);
17 years ago
A slight modification from Northie's post here ( http://us2.php.net/manual/en/function.ucfirst.php#68443), where lcfirst may not exist in your PHP build:
<?php
if(false === function_exists('lcfirst'))
{
/**
* Make a string's first character lowercase
*
* @param string $str
* @return string the resulting string.
*/
function lcfirst( $str ) {
<span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>s</mi><mi>t</mi><mi>r</mi><mo stretchy="false">[</mo><mn>0</mn><mo stretchy="false">]</mo><mo>=</mo><mi>s</mi><mi>t</mi><mi>r</mi><mi>t</mi><mi>o</mi><mi>l</mi><mi>o</mi><mi>w</mi><mi>e</mi><mi>r</mi><mo stretchy="false">(</mo></mrow><annotation encoding="application/x-tex">str[0] = strtolower(</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:1em;vertical-align:-0.25em;"></span><span class="mord mathnormal">s</span><span class="mord mathnormal">t</span><span class="mord mathnormal" style="margin-right:0.02778em;">r</span><span class="mopen">[</span><span class="mord">0</span><span class="mclose">]</span><span class="mspace" style="margin-right:0.2778em;"></span><span class="mrel">=</span><span class="mspace" style="margin-right:0.2778em;"></span></span><span class="base"><span class="strut" style="height:1em;vertical-align:-0.25em;"></span><span class="mord mathnormal">s</span><span class="mord mathnormal">t</span><span class="mord mathnormal" style="margin-right:0.02778em;">r</span><span class="mord mathnormal">t</span><span class="mord mathnormal">o</span><span class="mord mathnormal" style="margin-right:0.01968em;">l</span><span class="mord mathnormal">o</span><span class="mord mathnormal" style="margin-right:0.02691em;">w</span><span class="mord mathnormal" style="margin-right:0.02778em;">er</span><span class="mopen">(</span></span></span></span>str[0]);
return (string)$str;
}
}
/* Tests */
echo var_dump(lcFirst(NULL)).'<br />'; /* string(0) "" */
echo var_dump(lcFirst('')) .'<br />'; /* string(0) "" */
echo var_dump(lcFirst('S')) .'<br />'; /* string(1) "S" */
echo var_dump(lcFirst('É')) .'<br />'; /* string(0) "�" */
echo var_dump(lcFirst('Hello World!!!')); /* string(14) "hello World!!!" */