How does PHP intercept a string and complete the str_pad () function with zero?

ArticleDirectory

• Syntax
• Example 1
• Example 2
• Example 3
• Syntax
• Example 1
• Example 2
• Example 3

Introduction: This is a detailed page on how PHP intercepts strings and completes str_pad () Functions with zero padding. It introduces PHP, related knowledge, skills, experience, and some PHP source code.

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Definition and usage

The str_pad () function fills the string with the specified length.

Syntax

 
Str_pad (string, length, pad_string, pad_type)
 

Parameters	Description
String	Required. Specifies the string to be filled.
Length	Required. Specify the length of the new string. If the value is smaller than the length of the original string, no operation is performed.
Pad_string	Optional. The specified string for filling. The default value is blank.
Pad_type	Optional. Specify the other side of the string to be filled. Possible values: Str_pad_both-fill in the two ends of the string. If it is not an even number, the right side will receive additional filling. Str_pad_left-fill in the left side of the string. Str_pad_right-fill in the string to the right. This is the default one.

Example 1

<? PHP
$ STR = "http://www.my400800.cn
";
Echo str_pad ($ STR, 30 ,".");
?>

Output:

Http://www.my400800.cn ........

Example 2

<? PHP
$ STR = "http://www.my400800.cn
";
Echo str_pad ($ STR, 30, ".", str_pad_left );
?>

Output:

...... Http://www.my400800.cn

Example 3

<? PHP
$ STR = "http://www.my400800.cn ";
Echo str_pad ($ STR, 30, ".:", str_pad_both );
?>

Output:

 
..: Http://www.my400800.cn .:.:
 

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Definition and usage

The str_pad () function fills the string with the specified length.

Syntax

 
Str_pad (string, length, pad_string, pad_type)
 

Parameters	Description
String	Required. Specifies the string to be filled.
Length	Required. Specify the length of the new string. If the value is smaller than the length of the original string, no operation is performed.
Pad_string	Optional. The specified string for filling. The default value is blank.
Pad_type	Optional. Specify the other side of the string to be filled. Possible values: Str_pad_both-fill in the two ends of the string. If it is not an even number, the right side will receive additional filling. Str_pad_left-fill in the left side of the string. Str_pad_right-fill in the string to the right. This is the default one.

Example 1

<? PHP
$ STR = "http://www.my400800.cn
";
Echo str_pad ($ STR, 30 ,".");
?>

Output:

Http://www.my400800.cn ........

Example 2

<? PHP
$ STR = "http://www.my400800.cn
";
Echo str_pad ($ STR, 30, ".", str_pad_left );
?>

Output:

...... Http://www.my400800.cn

Example 3

<? PHP
$ STR = "http://www.my400800.cn ";
Echo str_pad ($ STR, 30, ".:", str_pad_both );
?>

Output:

 
..: Http://www.my400800.cn .:.: