In PHP, the link character refers to the symbol for linking strings. Its function is to splice characters, which can splice two or more strings into a new string. There are two types of PHP linkers: 1. "." connector, which is just a simple splicing of strings; 2. ".=" operator, which can be spliced and assigned, and can append the string (variable) on the right to the left.
The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer
In php, the link symbol refers to the link The symbol of a string is used as a splicing character, which can splice two or more strings into a new string.
For example: Splice the following two strings:
$str1="hello"; $str2="world";
into one string:
helloworld
There are two types of PHP linkers:
"." Connector
".=" Operator
1, "." The connector
is a simple splicing of strings. The syntax is:
string1.string2.string3. ······ .stringN
. The operation in the above example can be as follows:
$str1="hello"; $str2="world"; $str=$str1.$str2; echo $str;
A separator can also be added between the two strings
echo $str1." ".$str2; echo $str1."-".$str2;
2, ".=" operator
". =” is an assignment operator, which can append the string (variable) on the right side of the operator to the left side to form a new value and then assign it to the left side. Syntax:
$string = string1; $string .= string2; $string .= string3; ······ $string .= stringN;
The ".=" operator is more convenient to splice two strings, but splicing multiple strings at once is not possible. In this case, it is recommended to implement the "." operator.
Example:
$str1="hello"; $str2="world"; $str1.=$str2; echo $str1;
When using the ".=" operator to splice two strings, you cannot add a separator in the middle.
Recommended learning: "PHP Video Tutorial"
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