Implementation code for deleting the first character that appears in a string in PHP_PHP Tutorial

Copy code The code is as follows:

$a = "String";
$c= explode("Text to be deleted ", $a, 2);
$b = $c[0].$c[1];

explode
(PHP 3, PHP 4, PHP 5)

explode -- Use one string to split another string
Description
array explode ( string separator, string string [, int limit] )

This function returns An array composed of strings. Each element is a substring of string. They are separated by string separator as boundary points. If the limit parameter is set, the returned array contains up to limit elements, and the last element will contain the remainder of the string.
If separator is an empty string (""), explode() will return FALSE. If separator contains a value that is not found in string, explode() returns an array containing a single element of string.
If the limit parameter is negative, all elements except the last limit elements are returned. This feature is new in PHP 5.1.0.
Due to historical reasons, although implode() can receive two parameter orders, explode() cannot. You must ensure that the separator parameter comes before the string parameter.

Note: The parameter limit was added in PHP 4.0.1.
Example 1. explode() example

Copy code The code is as follows:

/ / Example 1
$pizza = "piece1 piece2 piece3 piece4 piece5 piece6";
$pieces = explode(" ", $pizza);
echo $pieces[0]; // piece1
echo $pieces[1]; // piece2

// Example 2
$data = "foo:*:1023:1000::/home/foo:/bin/sh";
list ($user, $pass, $uid, $gid, $gecos, $home, $shell) = explode(":", $data);
echo $user; // foo
echo $pass; // *
?>

Example 2. limit parameter example

Copy code The code is as follows:

$str = 'one|two|three|four';
// Positive limit
print_r(explode('|', $ str, 2));
// Negative limit
print_r(explode('|', $str, -1));
?>

Above example Will output:

Array
(
[0] => one
[1] => two|three|four
)
Array
(
[0] => one
[1] => two
[2] => three
)

Note: This function can be used safely for binary objects .

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