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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)".
The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer
Method 1: Use substr function
<?php
echo substr("Hello world",1);
?>Output:
ello world
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)
| Parameters | Description |
|---|---|
| string | Required. Specifies a part of the string to be returned. |
| start | Required. Specifies where in the string to begin.
|
| length | Optional. Specifies the length of the string to be returned. The default is until 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
<?php
echo substr_replace("abcdef","",0,1);
?>Output:
bcdef
Description:
substr_replace() function replaces part of a string with another string.
Syntax:
substr_replace(string,replacement,start,length)
| 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.
|
| length |
is optional. Specifies how many characters to replace. The default is the same as the string length.
|
Return value: Returns the replaced string. If string is an array, the array is returned.
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