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The difference between PHP functions and C functions is: syntax: PHP uses function declaration, uses $ parameter, and returns return value; C uses returnType functionName(...) declaration, does not use parameter symbols, and can be explicit or implicit return. Type system: PHP loosely typed, C strongly typed. Memory management: PHP garbage collection, C manual allocation and deallocation. Runtime environment: PHP interpreted, C compiled.
The difference between PHP functions and C functions
Differences in syntax
function
keyword, while C functions are declared using the returnType functionName(...) { ... }
. $
symbols, while C function parameters do not use special symbols. return
keyword, while C return values can be returned explicitly or implicitly (indicated by the function signature). Type system
Memory Management
new
and delete
operators. Runtime environment
Practical case
Consider a function that replaces the vowels in a given string with "A"
:
PHP code
function replaceVowels($string) { return preg_replace('/[aeiou]/i', 'A', $string); }
C code
string replaceVowels(const string& str) { string result = str; for (char& c : result) { if (c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u' || c == 'A' || c == 'E' || c == 'I' || c == 'O' || c == 'U') { c = 'A'; } } return result; }
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