PHP 8.3.4 Released!

lcfirst

(PHP 5 >= 5.3.0, PHP 7, PHP 8)

lcfirstTorna minúsculo o primeiro caractere de uma string

Descrição

lcfirst(string $string): string

Retorna uma string com o primeiro caractere de string em letra minúscula se o caractere for um ASCII na faixa de "A" (0x41) a "Z" (0x5a).

Parâmetros

string

A string de entrada.

Valor Retornado

Retorna a string resultante.

Registro de Alterações

Versão Descrição
8.2.0 A conversão de maiúsculas e minúsculas não depende mais da localidade definida com setlocale(). Somente caracteres ASCII serão convertidos.

Exemplos

Exemplo #1 Exemplo de lcfirst()

<?php
$foo
= 'OlaMundo';
$foo = lcfirst($foo); // olaMundo

$bar = 'OLA MUNDO!';
$bar = lcfirst($bar); // oLA MUNDO!
$bar = lcfirst(strtoupper($bar)); // oLA MUNDO!
?>

Veja Também

  • ucfirst() - Make a string's first character uppercase
  • strtolower() - Converte uma string para minúsculas
  • strtoupper() - Make a string uppercase
  • ucwords() - Converte para maiúsculas o primeiro caractere de cada palavra

add a note

User Contributed Notes 4 notes

up
19
phpnet at katylavallee dot com
14 years ago
Easiest work-around I've found for <5.3:
<?php

$string
= "CamelCase"
$string{0} = strtolower($string{0})
echo
$string; // outputs camelCase

?>
up
6
alex aulbach
15 years ago
In some cases maybe more useful?

$lower = strtolower( substr($upper,0,1) ) . substr($upper,1);
up
2
harmor
15 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 ) {
$str[0] = strtolower($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!!!" */
up
-23
ahlers_wim at hotmail dot com
15 years ago
As of PHP release 6 direct reference modification is not permitted any more.
Reference modification is the process of manipulating characters within a string by means of the instruction such as:
$str[0] in the code line: $str[0] = strtolower($str[0]);

For this reason I have recoded the lcfirst function (on function_exists('lcfirst') === false) as follows:

<?php
if ( false === function_exists('lcfirst') ):
function
lcfirst( $str )
{ return (string)(
strtolower(substr($str,0,1)).substr($str,1));}
endif;
?>

Remarks:
Also notice that I have used the more modern scope delimeters (if:-endif;) and I have also removed the unnecessary intermediate result. That is, the manipulation is returned directly.
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