I've encountered a memory leak in gmp_cmp if a literal string is used as the second value inside of loops. A workaround is to initialize first, then use the variable. I wasn't able to generate a minimum code sample, it's something more complicated, but I was able to fix it as follows:
<?php
$x = gmp_init(strval(mt_rand()));
// Depending on surrounding code, may have leaks
while (true)
{
if (!gmp_cmp($x, '1'))
print 'one'."\n";
}
// Usually doesn't have leaks
$one = gmp_init('1');
while (true)
{
if (!gmp_cmp($x, $one))
print 'one'."\n";
}
?>
gmp_cmp
(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)
gmp_cmp — Compara números
Parâmetros
Valor Retornado
Retorna um valor positivo se a > b, zero se
a = b e um valor negativo se a <
b.
Exemplos
Exemplo #1 Exemplo de gmp_cmp()
<?php
$cmp1 = gmp_cmp("1234", "1000"); // maior que
$cmp2 = gmp_cmp("1000", "1234"); // menor que
$cmp3 = gmp_cmp("1234", "1234"); // igual a
echo "$cmp1 $cmp2 $cmp3\n";
?>O exemplo acima produzirá:
1 -1 0
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russell dot harper at springboardnetworks dot com ¶
14 years ago
