I came across the PHP documents today on Type Juggling and String conversion and find this interesting behavior.
$result = 10 + "10 pigs"; // integer(20);
$result1 = "10.0 people" + 10'; // float(20.0);
The "+" sign is an automatic type conversion operand. Just like the example above, it doesn't care if you have non-numeric string inside your "string", it will convert to numbers for you. The catch is, the number in a string must be occurred first, it won't work if the numeric value sits in the middle of the string.
According to the PHP document,
For further readings, here are the links:
$result = 10 + "10 pigs"; // integer(20);
$result1 = "10.0 people" + 10'; // float(20.0);
The "+" sign is an automatic type conversion operand. Just like the example above, it doesn't care if you have non-numeric string inside your "string", it will convert to numbers for you. The catch is, the number in a string must be occurred first, it won't work if the numeric value sits in the middle of the string.
According to the PHP document,
A valid numeric data is an optional sign, followed by one or more digits (optionally containing a decimal point), followed by an optional exponent. The exponent is an 'e' or 'E' followed by one or more digits.
For further readings, here are the links:
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