How to delete the first character of a string in php-PHP Problem-php.cn

php method to delete the first character of a string: 1. Use the substr function, the syntax format "substr(string,1)"; 2. Use the substr_replace() function, the syntax format "substr_replace(string ,"",0,1)".

How to delete the first character of a string in php

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

Method 1: Use substr function

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Output:

ello world

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Description:

substr() function returns characters part of the string.

Note: If the start parameter is negative and length is less than or equal to start, length is 0.

Syntax:

substr(string,start,length)

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Parameters	Description
string	Required. Specifies a part of the string to be returned.
start	Required. Specifies where in the string to begin. Positive number - starts at the specified position in the string Negative number - starts at the specified position from the end of the string 0 - at the first character in the string Start at
length	Optional. Specifies the length of the string to be returned. The default is until the end of the string. Positive number - Returns from the position of the start parameter Negative number - Returns from the end of the string

Return value: Returns the extracted part of the string, returns FALSE if it fails, or returns an empty string.

Method 2: Use substr_replace() function

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Output:

bcdef

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Description:

substr_replace() function replaces part of a string with another string.

Syntax:

substr_replace(string,replacement,start,length)

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Parameters	Description
string	Required. Specifies the string to check.
replacement	Required. Specifies the string to be inserted.
start	Required. Specifies where in the string to begin replacement. Positive numbers - Replace starting at the specified position in the string Negative numbers - Replace starting at the specified position from the end of the string 0 - Replace at the specified position in the string Start replacing the first character in
length	is optional. Specifies how many characters to replace. The default is the same as the string length. Positive number - the length of the string being replaced Negative number - indicates the number of characters from the end of the substring to be replacedstring. 0 - Insert instead of replace

Return value: Returns the replaced string. If string is an array, the array is returned.

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