1 | <?php |
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2 | global $wpdb; |
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3 | $wpdb->query( "DELETE FROM $wpdb->postmeta WHERE post_id = 123" ); |
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4 | |
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5 | echo "Beginning memory usage: " . memory_get_usage() / 1000000 . "MB\n"; |
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6 | |
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7 | $count = 5000; |
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8 | |
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9 | $metadata = array(); |
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10 | for ( $i = 0; $i <= $count; $i++ ) { |
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11 | $metadata[ 'foo' . $i ] = rand_long_str( $i ); |
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12 | } |
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13 | |
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14 | $time = microtime( true ); |
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15 | $mem = memory_get_usage(); |
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16 | |
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17 | //add_metadatas( 'post', 123, $metadata ); |
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18 | |
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19 | $wpdb->query( 'START TRANSACTION;' ); |
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20 | for ( $i = 0; $i <= $count; $i++ ) { |
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21 | add_metadata( 'post', 123, 'foo' . $i, $i ); |
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22 | } |
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23 | $wpdb->query( 'COMMIT;' ); |
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24 | |
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25 | $ntime = microtime( true ); |
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26 | $nmem = memory_get_usage(); |
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27 | |
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28 | echo "Time: " . ( $ntime - $time ) . "\n"; |
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29 | echo "Memory: " . ( ( $nmem - $mem ) / 1000000 ) . "MB\n"; |
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30 | |
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31 | function rand_long_str( $length ) { |
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32 | $chars = 'abcdefghijklmnopqrstuvwxyz'; |
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33 | $string = ''; |
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34 | |
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35 | for ( $i = 0; $i < $length; $i++ ) { |
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36 | $rand = rand( 0, strlen( $chars ) - 1 ); |
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37 | $string .= substr( $chars, $rand, 1 ); |
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38 | } |
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39 | |
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40 | return $string; |
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41 | } |
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42 | |
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43 | /** |
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44 | * Add multiple metadatas for the specified object. Similar to calling add_metadata for each metadata individually, |
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45 | * and is only applicable for unique meta data. If a meta key already exists for an object it will not be stored. |
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46 | * |
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47 | * @since x.x.x |
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48 | * |
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49 | * @global wpdb $wpdb WordPress database abstraction object. |
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50 | * |
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51 | * @param string $meta_type Type of object metadata is for (e.g., comment, post, or user) |
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52 | * @param int $object_id ID of the object metadata is for |
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53 | * @param array $meta_data Metadata as an key/value pair array |
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54 | * |
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55 | * @return bool If the metadata was stored successfully. |
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56 | */ |
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57 | function add_metadatas($meta_type, $object_id, $meta_data) { |
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58 | global $wpdb; |
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59 | |
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60 | if ( ! $meta_type || ! is_array( $meta_data ) || ! is_numeric( $object_id ) ) { |
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61 | return false; |
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62 | } |
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63 | |
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64 | $object_id = absint( $object_id ); |
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65 | if ( ! $object_id ) { |
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66 | return false; |
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67 | } |
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68 | |
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69 | $table = _get_meta_table( $meta_type ); |
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70 | if ( ! $table ) { |
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71 | return false; |
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72 | } |
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73 | |
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74 | $column = sanitize_key($meta_type . '_id'); |
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75 | |
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76 | /** |
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77 | * Filter whether to add metadatas of a specific type. |
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78 | * |
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79 | * The dynamic portion of the hook, `$meta_type`, refers to the meta |
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80 | * object type (comment, post, or user). Returning a non-null value |
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81 | * will effectively short-circuit the function. |
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82 | * |
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83 | * @since x.x.x |
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84 | * |
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85 | * @param null|bool $check Whether to allow adding metadata for the given type. |
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86 | * @param int $object_id Object ID. |
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87 | * @param string $meta_key Meta key. |
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88 | * @param mixed $meta_value Meta value. Must be serializable if non-scalar. |
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89 | * @param bool $unique Whether the specified meta key should be unique |
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90 | * for the object. Optional. Default false. |
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91 | */ |
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92 | $check = apply_filters( "add_{$meta_type}_metadatas", null, $object_id, $meta_data ); |
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93 | if ( null !== $check ) |
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94 | return $check; |
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95 | |
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96 | |
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97 | $sql = false; |
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98 | |
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99 | $rows = array(); |
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100 | if( ! empty( $meta_data ) ) { |
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101 | $sql = "INSERT INTO {$table} ({$column}, meta_key, meta_value) VALUES "; |
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102 | |
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103 | $comma = false; |
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104 | $value_string = '( %d, %s, %s)'; |
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105 | foreach( $meta_data as $key => $value ) { |
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106 | if( true == $comma ) { |
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107 | $sql .= ', '; |
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108 | } |
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109 | |
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110 | $sql .= $value_string; |
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111 | |
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112 | $sql = $wpdb->prepare( $sql, $object_id, $key, $value ); |
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113 | $comma = true; |
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114 | } |
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115 | } |
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116 | |
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117 | if( $sql ) { |
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118 | $result = $wpdb->query( $sql ); |
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119 | } else { |
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120 | return false; |
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121 | } |
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122 | |
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123 | if ( ! $result ) { |
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124 | return false; |
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125 | } |
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126 | |
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127 | wp_cache_delete($object_id, $meta_type . '_meta'); |
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128 | |
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129 | return true; |
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130 | } |
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131 | |
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132 | /** |
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133 | * Delete metadata for the specified object. |
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134 | * |
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135 | * @since x.x.x |
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136 | * |
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137 | * @global wpdb $wpdb WordPress database abstraction object. |
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138 | * |
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139 | * @param string $meta_type Type of object metadata is for (e.g., comment, post, or user) |
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140 | * @param int $object_id ID of the object metadata is for |
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141 | * @param string $meta_keys Metadata keys |
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142 | * @return bool True on successful delete, false on failure. |
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143 | */ |
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144 | function delete_metadatas($meta_type, $object_id, $meta_keys) { |
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145 | global $wpdb; |
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146 | |
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147 | if ( ! $meta_type || ! is_array( $meta_keys ) || ! is_numeric( $object_id ) ) { |
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148 | return false; |
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149 | } |
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150 | |
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151 | $object_id = absint( $object_id ); |
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152 | if ( ! $object_id ) { |
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153 | return false; |
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154 | } |
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155 | |
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156 | $table = _get_meta_table( $meta_type ); |
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157 | if ( ! $table ) { |
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158 | return false; |
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159 | } |
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160 | |
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161 | $type_column = sanitize_key($meta_type . '_id'); |
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162 | |
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163 | // expected_slashed ($meta_key) |
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164 | $meta_key = array_map( 'wp_unslash', $meta_keys ); |
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165 | |
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166 | /** |
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167 | * Filter whether to delete metadata of a specific type. |
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168 | * |
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169 | * The dynamic portion of the hook, `$meta_type`, refers to the meta |
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170 | * object type (comment, post, or user). Returning a non-null value |
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171 | * will effectively short-circuit the function. |
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172 | * |
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173 | * @since x.x.x |
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174 | * |
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175 | * @param null|bool $delete Whether to allow metadata deletion of the given type. |
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176 | * @param int $object_id Object ID. |
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177 | * @param string $meta_keys Meta keys. |
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178 | */ |
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179 | $check = apply_filters( "delete_{$meta_type}_metadatas", null, $object_id, $meta_keys ); |
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180 | if ( null !== $check ) |
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181 | return (bool) $check; |
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182 | |
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183 | /** |
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184 | * Fires immediately before deleting metadata of a specific type. |
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185 | * |
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186 | * The dynamic portion of the hook, `$meta_type`, refers to the meta |
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187 | * object type (comment, post, or user). |
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188 | * |
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189 | * @since x.x.x |
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190 | * |
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191 | * @param int $object_id Object ID. |
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192 | * @param string $meta_keys Meta keys. |
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193 | */ |
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194 | do_action( "delete_{$meta_type}_metas", $object_id, $meta_keys ); |
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195 | |
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196 | $sql = "DELETE FROM {$table} WHERE {$type_column} = {$object_id} and meta_key IN( "; |
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197 | |
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198 | $comma = false; |
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199 | foreach( $meta_keys as $meta_key ) { |
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200 | if( true == $comma ) { |
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201 | $sql .= ', '; |
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202 | } |
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203 | |
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204 | $sql .= " `{$meta_key}`"; |
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205 | $comma = true; |
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206 | } |
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207 | |
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208 | $sql .= " )"; |
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209 | |
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210 | |
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211 | $count = $wpdb->query( $sql ); |
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212 | |
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213 | if ( ! $count ) |
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214 | return false; |
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215 | |
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216 | wp_cache_delete($object_id, $meta_type . '_meta'); |
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217 | |
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218 | /** |
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219 | * Fires immediately after deleting metadata of a specific type. |
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220 | * |
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221 | * The dynamic portion of the hook name, `$meta_type`, refers to the meta |
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222 | * object type (comment, post, or user). |
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223 | * |
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224 | * @since x.x.x |
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225 | * |
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226 | * @param int $object_id Object ID. |
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227 | * @param string $meta_keys Meta key. |
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228 | */ |
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229 | do_action( "deleted_{$meta_type}_metas", $object_id, $meta_keys ); |
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230 | |
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231 | return true; |
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232 | } |
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