php functions that can output variables or array values are: 1. echo, used to output one or more strings to the standard output; 2. print, used to output one or more strings to the standard output Output; 3. var_dump, used to print variable-related information, including type and value, and output it.
Operating system for this tutorial: Windows 10 system, php8.1.3 version, Dell G3 computer.
In PHP, you can use the following functions to output the value of a variable or array:
echo: used to output one or more strings to standard output ( usually a browser). Text, variables and simple expressions can be output.
For example:
$name = "Alice"; echo "Hello, " . $name; // 输出:Hello, Alice
print: Similar to echo, used to output one or more strings to standard output. The difference is that print can only output a string and cannot output multiple variables or expressions.
For example:
$name = "Alice"; print("Hello, " . $name); // 输出:Hello, Alice
var_dump: used to print variable-related information, including type and value, and output it. Particularly useful for debugging and viewing the structure of arrays.
For example:
$array = array('apple', 'banana', 'orange'); var_dump($array); 输出: array(3) { [0]=> string(5) "apple" [1]=> string(6) "banana" [2]=> string(6) "orange" }
The above functions can be used to output the value of a variable or array. The specific function to choose depends on the output requirements and format.
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