PHP循环的问题

问题描述

问 题

PHP中，我想0-9循环，a-z循环，然后输出%0a,%0b,%0c这样的字符需要怎么写代码啊。。求教.

解决方案

$ret = array();
for($char = '0';$char<='9';$char++){
    for($alpha = 'a';$alpha<='z'&&strlen($alpha)==1;$alpha++){
        $ret[] = "%$char$alpha";
    }
}

$retStr = implode($ret,',');

print_r($retStr);

输出：

---

%0a,%0b,%0c,%0d,%0e,%0f,%0g,%0h,%0i,%0j,%0k,%0l,%0m,%0n,%0o,%0p,%0q,%0r,%0s,%0t,%0u,%0v,%0w,%0x,%0y,%0z,%1a,%1b,%1c,%1d,%1e,%1f,%1g,%1h,%1i,%1j,%1k,%1l,%1m,%1n,%1o,%1p,%1q,%1r,%1s,%1t,%1u,%1v,%1w,%1x,%1y,%1z,%2a,%2b,%2c,%2d,%2e,%2f,%2g,%2h,%2i,%2j,%2k,%2l,%2m,%2n,%2o,%2p,%2q,%2r,%2s,%2t,%2u,%2v,%2w,%2x,%2y,%2z,%3a,%3b,%3c,%3d,%3e,%3f,%3g,%3h,%3i,%3j,%3k,%3l,%3m,%3n,%3o,%3p,%3q,%3r,%3s,%3t,%3u,%3v,%3w,%3x,%3y,%3z,%4a,%4b,%4c,%4d,%4e,%4f,%4g,%4h,%4i,%4j,%4k,%4l,%4m,%4n,%4o,%4p,%4q,%4r,%4s,%4t,%4u,%4v,%4w,%4x,%4y,%4z,%5a,%5b,%5c,%5d,%5e,%5f,%5g,%5h,%5i,%5j,%5k,%5l,%5m,%5n,%5o,%5p,%5q,%5r,%5s,%5t,%5u,%5v,%5w,%5x,%5y,%5z,%6a,%6b,%6c,%6d,%6e,%6f,%6g,%6h,%6i,%6j,%6k,%6l,%6m,%6n,%6o,%6p,%6q,%6r,%6s,%6t,%6u,%6v,%6w,%6x,%6y,%6z,%7a,%7b,%7c,%7d,%7e,%7f,%7g,%7h,%7i,%7j,%7k,%7l,%7m,%7n,%7o,%7p,%7q,%7r,%7s,%7t,%7u,%7v,%7w,%7x,%7y,%7z,%8a,%8b,%8c,%8d,%8e,%8f,%8g,%8h,%8i,%8j,%8k,%8l,%8m,%8n,%8o,%8p,%8q,%8r,%8s,%8t,%8u,%8v,%8w,%8x,%8y,%8z,%9a,%9b,%9c,%9d,%9e,%9f,%9g,%9h,%9i,%9j,%9k,%9l,%9m,%9n,%9o,%9p,%9q,%9r,%9s,%9t,%9u,%9v,%9w,%9x,%9y,%9z

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