The string type in PHP is String. This variable type is used whether it is a single character or multiple characters. To assign a string to a string variable, you need to add double quotes at the beginning and end, such as "This is a string". When the
character is applied for line break, you can use the overflow character, that is, a backslash plus a specified symbol, such as n for line break, t for tab, etc. More escape characters are shown in Table 2-1.
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