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What does '.' in php mean?

青灯夜游
青灯夜游Original
2021-09-09 19:30:109965browse

The dot "." in php means "connection", which refers to the string connector, which can be used to splice two or more strings together to form a new string. ;The specific syntax format is "$string = string1.string2.string3.······.stringN;".

What does '.' in php mean?

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

In php, click ". " refers to the string concatenation character, which can splice two or more strings into a new string.

The specific syntax format is as follows:

$string = string1.string2.string3. ······ .stringn;

Example:

<?php
header("Content-type:text/html;charset=utf-8");
$str1="欢迎来到";
$str2="PHP中文网";
$str3=$str1.$str2;
echo "字符串1:".$str1;
echo "<br>字符串2:".$str2;
echo "<br>字符串1和字符串2拼接后:".$str3;
?>

Output result:

What does . in php mean?

Instructions: When using echo to output a string, you can also use curly brackets {$str} to embed variables in the string, such as "literal{$str}literal"; if you do not use { } You can also use word segmentation characters to separate variables and text. Word segmentation characters are generally spaces, punctuation marks, etc.

<?php
header("Content-type:text/html;charset=utf-8");
$str1="欢迎来到";
$str2="PHP中文网";
$str3=$str1.$str2;
echo "字符串1:".$str1;
echo "<br>字符串2:$str2";
echo "<br>字符串1和字符串2拼接后: {$str3}";
?>

Output result:

What does . in php mean?

In javascript, we can use " " to splice strings, but in PHP, the " " sign can only do arithmetic operator, but cannot be used as a string operator; then can only the "." operator be used to concatenate strings? No, you can also use the assignment operator ".=". The

.= operator appends the characters on the right to the left. Its syntax is:

$string = string1;
$string .= string2;
$string .= string3;
······
$string .= stringn;

Recommended learning: "PHP Video Tutorial"

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